The covariance Cov(X,Y) between two random variables X and Y is k/80.
The covariance (Cov) between two random variables X and Y is defined as:
Cov(X,Y) = E(XY) - E(X)E(Y)
where E(X) denotes the expected value of X and
E(Y) denotes the expected value of Y.
Therefore, we need to calculate E(X), E(Y) and E(XY) to find the covariance Cov(X,Y).
Given that the joint PDF f(x,y) is kx² and is zero elsewhere, we can use it to find E(X), E(Y) and E(XY).
E(X) = ∫∫ xf(x,y)dydx
= ∫₀¹ ∫₀¹ xkx² dy dx
= k/4E(Y)
= ∫∫ yf(x,y)dxdy
= ∫₀¹ ∫₀¹ ykx² dx dy
= k/4E(XY)
= ∫∫ xyf(x,y)dydx
= ∫₀¹ ∫₀¹ xykx² dy dx
= k/5
Using the above values we get:
Cov(X,Y) = E(XY) - E(X)E(Y)
= k/5 - (k/4)*(k/4)
= k/80
Therefore, the covariance Cov(X,Y) between X and Y is k/80.
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find a cartesian equation for the curve and identify it. r = 2 tan() sec()
Given the polar equation r = 2 tan θ sec θ, we need to find its cartesian equation and identify the curve it represents.To convert a polar equation to a cartesian equation,
we use the following formula:x = r cos θ, y = r sin θTherefore, r = sqrt(x² + y²) and tan θ = y/x. Also, sec θ = 1/cos θ.Hence, we can substitute these values in the given polar equation:r = 2 tan θ sec θ => r = 2 (y/x) (1/cos θ)=> r = 2y / (x cos θ) => sqrt(x² + y²) = 2y / (x cos θ) => x² + y² = (2y / cos θ)²=> x² + y² = 4y² / cos² θ=> x² + y² = 4y² (1 + tan² θ)We know that 1 + tan² θ = sec² θTherefore, x² + y² = 4y² sec² θNow, sec θ = 1/cos θ, so the cartesian equation can be written as:x² + y² = 4y² (1/cos² θ) => x² + y² = 4y² / cos² θThis equation is a circle with center (0, 0) and radius 2/cosθ. It is centered on the y-axis. Therefore, the cartesian equation for the given polar equation is x² + y² = 4y² / cos² θ, and it represents a circle centered on the y-axis.
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The cartesian equation for the given polar equation is x² + y² = 4y² / cos² θ, and it represents a circle centered on the y-axis.
Given the polar equation r = 2 tan θ sec θ, we need to find its cartesian equation and identify the curve it represents. To convert a polar equation to a cartesian equation,
we use the following formula: x = r cos θ, y = r sin θ.
Therefore, r = √ (x² + y²) and tan θ = y/x.
Also, sec θ = 1/cos θ.
Hence, we can substitute these values in the given polar equation: r = 2 tan θ sec θ
=> r = 2 (y/x) (1/cos θ)
=> r = 2y / (x cos θ)
=> √(x² + y²) = 2y / (x cos θ)
=> x² + y² = (2y / cos θ)²
=> x² + y² = 4y² / cos² θ=>
x² + y² = 4y² (1 + tan² θ)
We know that 1 + tan² θ = sec² θ.
Therefore, x² + y² = 4y² sec² θ
Now, sec θ = 1/cos θ, so the cartesian equation can be written as:
x² + y² = 4y² (1/cos² θ) =>
x² + y² = 4y² / cos² θ
This equation is a circle with center (0, 0) and radius 2/cosθ. It is centered on the y-axis.
Therefore, the cartesian equation for the given polar equation is x² + y² = 4y² / cos² θ, and it represents a circle centered on the y-axis.
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Find the area that are bounded by: y=x2+5x
and y=3−x2 from x=−2 to
x=0
The area bounded by the curves y = x^2 + 5x and y = 3 - x^2 from x = -2 to x = 0 is 4.5 square units.
To find the area bounded by the given curves, we need to calculate the definite integral of the difference between the two functions over the given interval.
First, let's find the points of intersection between the two curves:
x^2 + 5x = 3 - x^2
2x^2 + 5x - 3 = 0
Solving this quadratic equation, we find x = -3/2 and x = 1/2 as the points of intersection.
To determine the area, we integrate the difference between the two functions over the interval [-2, 0]:
Area = ∫[from -2 to 0] (3 - x^2 - (x^2 + 5x)) dx
Simplifying the integrand, we have:
Area = ∫[from -2 to 0] (3 - 2x^2 - 5x) dx
Integrating the above expression, we get:
Area = [3x - (2/3)x^3 - (5/2)x^2] evaluated from -2 to 0
Evaluating the definite integral at the limits, we have:
Area = (3(0) - (2/3)(0)^3 - (5/2)(0)^2) - (3(-2) - (2/3)(-2)^3 - (5/2)(-2)^2)
Area = 0 - (-8/3) - 10
Area = 4.5 square units
Therefore, the area bounded by the curves y = x^2 + 5x and y = 3 - x^2 from x = -2 to x = 0 is 4.5 square units.
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A curve with polar equation r = 39/( 6sinθ+13cosθ) represents a line. This line has a Cartesian equation of the form y = mx + b ,where m and b are constants. Give the formula for y in terms of x. y =
To find the Cartesian equation of the line represented by the given polar equation, we need to convert the polar equation to rectangular form. We have the polar equation r = 39/(6sinθ + 13cosθ). To convert it, we can use the following relations: r = √(x^2 + y^2) and θ = atan2(y, x), where atan2(y, x) is the four-quadrant inverse tangent function.
Substituting these relations into the polar equation, we have √(x^2 + y^2) = 39/(6sinθ + 13cosθ). Squaring both sides, we get x^2 + y^2 = (39/(6sinθ + 13cosθ))^2. Rearranging the equation, we have x^2 + y^2 = 1521/(36sin^2θ + 156sinθcosθ + 169cos^2θ).
Since we are given that the line has the Cartesian equation y = mx + b, we can isolate y in terms of x by solving for y in the equation x^2 + y^2 = 1521/(169 + 156sinθcosθ). By rearranging the equation, we have y^2 = 1521/(169 + 156sinθcosθ) - x^2. Taking the square root of both sides, we get y = ±√(1521/(169 + 156sinθcosθ) - x^2). Therefore, the formula for y in terms of x for the line represented by the given polar equation is y = ±√(1521/(169 + 156sinθcosθ) - x^2).
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The given sequence converges to {n3/(n4-1)}[infinity]/(n=1)
1
0
[infinity]
-1
The given sequence converges to [tex]{n^3/(n^4 - 1)}[infinity]/(n=1)[/tex] Convergent Sequence:A sequence is said to be convergent if it approaches to a limit as n increases.
In other words, if the limit of the sequence exists and is finite then we say the sequence is convergent.
Sequence[tex]{n^3/(n^4 - 1)}[infinity]/(n=1)[/tex] is convergent since its limit exists and is finite.
This is because;(by direct substitution and ratio test).
Hence, the given sequence converges to 0.
Solution:The sequence [tex]{n^3/(n^4 - 1)}[infinity]/(n=1)[/tex] is convergent and its limit is 0. Let's see how we arrive at this conclusion: Limits of sequences are important to determine the behavior of the sequence as the index n increases. The limit of the sequence is the number that the terms in the sequence approach as n increases. If a sequence approaches a limit, we say it is convergent.
It is said to be divergent if it does not approach a limit. To determine the limit of the sequence[tex]{n^3/(n^4 - 1)}[infinity]/(n=1),[/tex] we can divide both the numerator and the denominator by [tex]n^4[/tex]. Thus, we get,[tex]{n^3/(n^4 - 1)} = {1/(n - 1/n^3)}[infinity]/(n=1)[/tex]
As n increases, [tex]1/n^3[/tex]approaches 0 much faster than 1/n. So, the sequence can be approximated as,[tex]{1/(n - 1/n^3)} [infinity]/(n=1) ={1/n} [infinity]/(n=1)[/tex]→ 0 as n → ∞
Hence, we can conclude that the sequence [tex]{n^3/(n^4 - 1)}[infinity]/(n=1)[/tex] is convergent and its limit is 0.
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Step-by-step Error Analysis – Section 0.5: Exponents and Power Functions
Identify each error, step-by-step, that is made in the following attempt to solve the problem. I am NOT asking you for the correct solution to the problem. Do not just say the final answer is wrong. Go step by step from the beginning. Describe what was done incorrectly (if anything) from one step to the next. Explain what the student did incorrectly and what should have been done instead; not just that an error was made. After an error has been made, the next step should be judged based on what is written in the previous step (not on what should have been written). Some steps may not have an error.
Reply to 2 other student’s responses in your group. Confirm the errors the other student identified correctly, add any errors the student did not identify, and explain any errors the student listed that you disagree with. You must comment on each step.
The Problem: A corporation issues a bond costing $600 and paying interest compounded quarterly. After 5 years the bond is worth $800. What is the annual interest rate as a percent rounded to 1 decimal place?
A partially incorrect attempt to solve the problem is below: (Read Example 8, page 38 of the textbook for a similar problem with a correct solution.)
Steps to analyze:
A=P1+rnnt
600=8001+r420
600=800+200r20
600-800=200r20
-200=200r20
400=r20
r=400
r = 20
The annual interest rate is 20.0%
Grading:
Part 1: (63 points possible)
7 points for each step in which the error is accurately identified with a correct explanation of what should have been done (or correctly stated no error)
4 points for each step in which the error or explanation is only partially correct.
5% per day late penalty
Part 2: (37 points possible)
Up to 37 points for a complete response to 2 students
Up to 18 points for a complete response to only 1 student
5% per day late penalty
The formula is incorrect, as it should be $A = P(1+r/n)^(nt)$ instead of $A = P + (1+r/n)^(nt)$, which the student has incorrectly used. Explanation: A = the balance after the specified time P = principal r = interest rate n = the number of times per year the interest is compounded t = time in year.
We have the following information given to us in the question: A corporation issues a bond costing $600 and paying interest compounded quarterly. After 5 years, the bond is worth $800. What is the annual interest rate as a percent rounded to 1 decimal place? A = 800, P = 600, n = 4 (compounded quarterly), and t = 5 years The formula that should be used is A = P(1+r/n)^(nt).
The student has incorrectly used A = P + (1+r/n)^(nt). Step 1: Incorrectly using formula: A = P + (1+r/n)^(nt). The student has used the incorrect formula. The correct formula to use is A = P(1+r/n)^(nt).Step 2: 600=8001+r420. This is correct as it uses the correct formula A = P(1+r/n)^(nt). Step 3: 600=800+200r20. This is correct as it uses the correct formula A = P(1+r/n)^(nt).Step 4: 600-800=200r20. This is correct as it uses the correct formula A = P(1+r/n)^(nt).Step 5: -200=200r20. This is incorrect, the student has solved for r incorrectly.
They have divided 200 by 20 instead of multiplying. It should be -200/400 = -0.5. The student should have written -200 = 200r(20) instead of -200=200r20. This step gets 4 points out of 7.Step 6: 400=r20. This is incorrect as the student has written the value of r first instead of solving for it. It should be r = 20. The student should have written 200r = 400 instead of 400=r20. This step gets 3 points out of 7.Step 7: r=20.
This is correct. The annual interest rate is 20.0%.This error analysis of the problem is correct, and all the steps have been explained correctly.
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Show that there exists holomorphic function on {z : || > 4} such that its derivative is equal to Z — (z – 1)(2 – 2)2 However, show that there does not exist holomorphic function on {z : [2] > 4} such that its derivative is equal to 22 (z – 1)(2 – 2)2
There is no holomorphic function g(z) on {z: |z| > 4} with derivative [tex]g'(z) = 22 (z - 1)(2 - 2)^2[/tex].
Let the holomorphic function be defined by:
[tex]f(z) = z^2 - (z - 1)(z + 2)^2 = z^2 - (z^3 + 4z^2 - 4z - 8)\\f(z) = z^2 - z^3 - 4z^2 + 4z + 8 = -z^3 - 3z^2 + 4z + 8[/tex]
Therefore, its derivative is:
[tex]f(z) = z^2 - (z - 1)(z + 2)^2 = z^2 - (z^3 + 4z^2 - 4z - 8)\\f(z) = z^2 - z^3 - 4z^2 + 4z + 8 = -z^3 - 3z^2 + 4z + 8[/tex]
The above function is holomorphic on {z: |z| > 4}
Next, we need to show that there is no holomorphic function g(z) on {z: [2] > 4} such that its derivative is equal to 22 (z – 1)(2 – 2)2.
It can be done by using the Cauchy integral theorem, which states that if f(z) is holomorphic on a closed contour C and z lies within C, then
[tex]\Phi(c)(z)g'(\eta)d\eta = 0[/tex]
This means that if there is a holomorphic function g(z) on {z: |z| > 4} with
derivative [tex]g'(z) = 22 (z - 1)(2 - 2)^2[/tex] and C is a closed contour in the region {z: |z| > 4}, then [tex]\Phi(c)(z)g'(\eta)d\eta = 0[/tex]
However,
[tex]\Phi(c)(z)g'(\eta)d\eta = \Phi(c)(z)d/dz[g(\eta)]d\eta = g(\eta)|c = C =/= 0[/tex]
This contradicts the Cauchy integral theorem and,
therefore, there is no holomorphic function g(z) on {z: |z| > 4} with derivative [tex]g'(z) = 22 (z - 1)(2 - 2)^2[/tex].
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Find the solution to the boundary value problem:
d²y/dt² - 3 dy/dt + 2y = 0, y(0) = 5, y(1) = 8
The solution is y =
The solution to the given boundary value problem is y = 2e^t + 3e^2t. To solve the boundary value problem, we start by finding the characteristic equation associated with the given differential equation:
r² - 3r + 2 = 0.
Factoring the equation, we have:
(r - 2)(r - 1) = 0.
So, the roots of the characteristic equation are r = 2 and r = 1.
The general solution to the homogeneous differential equation is then given by:
y(t) = C₁e^2t + C₂e^t,
where C₁ and C₂ are constants that need to be determined.
To find the specific solution that satisfies the given boundary conditions, we substitute the values y(0) = 5 and y(1) = 8 into the general solution.
Plugging in t = 0, we have:
5 = C₁e^0 + C₂e^0 = C₁ + C₂.
Similarly, for t = 1, we get:
8 = C₁e^2 + C₂e.
Now we have a system of equations:
C₁ + C₂ = 5,
C₁e^2 + C₂e = 8.
Solving this system, we find C₁ = 2 and C₂ = 3.
Thus, the solution to the boundary value problem is y = 2e^t + 3e^2t. This solution satisfies the given differential equation and the specified boundary conditions.
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The average cost in terms of quantity is given as C(q) =q²-3q +100, the margina profit is given as MP(q) = 3q - 1. Find the revenue. (Hint: C(q) = C(q)/q ²,R(0) = 0)
The revenue, R(q), is given by the equation R(q) = q³ - 3q² + 100q.
How to find the revenue using the given average cost and marginal profit functions?To find the revenue, we use the formula R(q) = q * C(q), where q represents the quantity and C(q) represents the average cost.
In this case, the average cost is given as C(q) = q² - 3q + 100.
To calculate the revenue, we substitute the expression for C(q) into the revenue formula:
R(q) = q * (q² - 3q + 100)
Expanding the expression, we get:
R(q) = q³ - 3q² + 100q
This equation represents the revenue as a function of the quantity, q. By plugging in different values for q, we can calculate the corresponding revenue values. The revenue represents the total income generated from selling a certain quantity of products or services.
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Divide and simplify: (-1026i) ÷ (-3-7i) = Submit Question
The solution of the division is 513/29 - 147/29i.
We are to divide and simplify:
(-1026i) ÷ (-3 - 7i)
To solve the problem, we use the following steps:
Step 1: Multiply the numerator and denominator by the conjugate of the denominator.
The conjugate of -3 - 7i is -3 + 7i.
Step 2: Simplify the numerator and denominator by multiplying out the brackets.
Step 3: Combine the like terms in the numerator and denominator.
Step 4: Write the answer in the form a + bi,
Where a and b are real numbers.
Therefore, (-1026i) ÷ (-3 - 7i) is equal to 1026/58 - 294/58i, or simplified further, 513/29 - 147/29i.
Hence, the solution is 513/29 - 147/29i.
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Write a quadratic function in the form f(x) = a(x-h) + k such that the graph of the function opens up, is vertically stretched by a factor of
The final quadratic function in the desired form is[tex]f(x) = m(x - h)^2 + k.[/tex]
To write a quadratic function in the form [tex]f(x) = a(x-h)^2 + k[/tex]such that the graph opens upward and is vertically stretched by a factor of m, we can start with the standard form of a quadratic function [tex]f(x) = x^2[/tex] and make the necessary transformations.
To vertically stretch the graph by a factor of m, we multiply the coefficient of the quadratic term by m. Therefore, the quadratic function becomes[tex]f(x) = mx^2[/tex].
To make the graph open upward, we need the coefficient of the quadratic term ([tex]x^2)[/tex] to be positive. Since multiplying by m preserves the sign, we can assume m > 0.
Now, we have f(x) = mx^2.
To shift the vertex to the point (h, k), we subtract h from x inside the quadratic term. Therefore, the quadratic function becomes
[tex]f(x) = m(x - h)^2[/tex].
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Solve the system of equations S below in R3. x + 2y + 5z = 2 (S): 3x + y + 4z = 1 2x - 7y + z = 5
Answer: The solution of the system of equations S as
(x, y, z) = ((114 - 29z)/2, (4z - 17)/2, z).
Step-by-step explanation:
The given system of equations is:
x + 2y + 5z = 2
3x + y + 4z = 1
2x - 7y + z = 5
To solve this system of equations, we will use the elimination method.
We will eliminate y variable from the second equation.
To eliminate y variable from the second equation, we will multiply the first equation by 3 and then subtract the second equation from it.
3(x + 2y + 5z = 2)
=> 3x + 6y + 15z = 6
Subtracting the second equation from it, we get:
-3x + 5z = 5
Now, we will eliminate y variable from the third equation.
We will multiply the first equation by 7 and then add the third equation to it.
7(x + 2y + 5z = 2)
=> 7x + 14y + 35z = 14
Adding the third equation to it, we get:
9x + 36z = 19
We have two equations now.
We can solve these two equations using any method.
Let's use the substitution method here.
Substitute -3x + 5z = 5 in 9x + 36z = 19 and solve for x.
9x + 36z = 19
=> x = (19 - 36z)/9
Substitute this value of x in the first equation.
We get:
-x - 2y - 5z = -2(19 - 36z)/9
- 2y - 5z = -2
=> -19 + 4z - 2y - 5z = -2
=> -2y - z = 17 - 4z
To eliminate y, we will substitute
-2y - z = 17 - 4z in 2x - 7y + z = 5.
2x - 7y + z = 5
=> 2x - 7(17 - 4z) + z = 5
=> 2x - 119 + 29z = 5
=> x = (114 - 29z)/2
We have values of x, y, and z now.
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I am as equally likely to be able to grade each part of problem number one in the interval of 20 and 45 seconds. Answer the following questions that pertain to this story. a) Draw a picture of the uniform density function and label the vertical and horizontal axes correctly. Make sure that your function's vertical axis portrays the correct probability and that you show work to find it. (2 pt.) b) What is the probability that it will take me between 23 and 35 seconds to grade a part of problem one? Show your work based on the density function in a). Give your answer as both an unreduced fraction and a decimal correctly rounded to 3 significant decimals. Don't forget probability notation. (3 pt.) WARNING: Standard normal values use only 2 decimals. You don't find normal probabilities unless you have a standard normal value. Normal probabilities are rounded to 4 decimals. 4. Cholesterol levels of women are normally distributed with a mean of 213 mg/dL and a standard deviation of 5.4 mg/dL according to JAMA Internal Medicine. Use this story to answer the three questions that follow: a) Find the probability that a randomly chosen woman's cholesterol level will be less than 202 mg/dL. Show your work and use a standardization. Show probability notation and a diagram. Use a table to find the probability and show a sketch of how you used it. (3 pt.) b) What is the cholesterol level in a unhealthy woman that would be considered to represent the break-point for the lowest 4% of all observations? Show all your work including all work un- standardizing. Show probability notation and a diagram. Round final answer to one decimal. Use a table to find the probability and show a sketch of how you used it. (3 pt.) c) Find the probability that in samples of 35, the average cholesterol level is higher than 216 mg/dL. Show work and use your standardization. Show probability notation and a diagram. Use a table to find the probability and show a sketch of how you used it. (3 pt.)
a) According to the uniform density function, the range of the possible times during which a part of the problem is being graded is between 20 and 45 seconds. b) The decimal form is 0.036 rounded to three significant decimals. Therefore, the answer is P(23 ≤ x ≤ 35) = 0.036.
a) Picture of the uniform density function and labeled correctly: Assuming that 20 and 45 seconds is the interval during which the grading will take place, we can draw a uniform density function as follows:
the horizontal axis shows time in seconds, and the vertical axis shows probability: According to the uniform density function, the range of the possible times during which a part of the problem is being graded is between 20 and 45 seconds.
b) Probability that it will take me between 23 and 35 seconds to grade a part of problem one:
If we look at the picture we drew above, the probability of a part of problem one being graded between 23 and 35 seconds is represented by the area under the curve in the region between 23 and 35 seconds.
Using the area formula for the rectangle gives us:
Area = height × width
= 1/(45 - 20) × (35 - 23)
= 12/325.
The probability of a part of problem one being graded between 23 and 35 seconds is 12/325.
The above answer is in unreduced fraction.
The decimal form is 0.036 rounded to three significant decimals.
Therefore, the answer is P(23 ≤ x ≤ 35) = 0.036.
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Give the degree measure of if it exists. Do not use a calculator 9 = arctan (1) Select the correct choice below and fill in any answer boxes in your choice. + A. 0 = 45,360n + 45,180n + 45 (Type your answer in degrees.) OB. arctan (1) does not exist.
The degree measure of `θ` is given by:
[tex]$$\theta = \arctan(1) = \arctan\left(\frac{\text{opposite}}{\text{adjacent}}\right) = \arctan\left(\frac{1}{1}\right) = 45^\circ$$[/tex]
So, the correct choice is A. `0 = 45,360n + 45,180n + 45, the degree measure of `arctan (1)` is the angle whose tangent is equal to 1.
This means that `arctan (1)` is the angle `θ` in the right triangle shown below,
where the opposite side `x = 1` and adjacent side `1`.
Right triangle in the xy-plane with hypotenuse passing through the origin.
Now, we can use the Pythagorean theorem to solve for the hypotenus
[tex]:$$\begin{aligned} 1^2 + 1^2 &= h^2 \\ 2 &= h^2 \\ \sqrt{2} &= h \end{aligned}$$[/tex]
Therefore, the degree measure of `θ` is given by:[tex]$$\theta = \arctan(1) = \arctan\left(\frac{\text{opposite}}{\text{adjacent}}\right) = \arctan\left(\frac{1}{1}\right) = 45^\circ$$[/tex]
So, the correct choice is A. `0 = 45,360n + 45,180n + 45
(Type your answer in degrees.)`.
We know that the tangent of an angle `θ` is equal to the ratio of the opposite side to the adjacent side of the angle.
That is,
[tex]$$\tan \theta = \frac{\text{opposite}}{\text{adjacent}}$$[/tex]`.
In this problem, we are given that `9 = arctan(1)
This means that[tex]$\tan(9) = 1$[/tex]or[tex]$$\frac{\text{opposite}}{\text{adjacent}} = 1$$[/tex]
Since the opposite side and adjacent side are both equal to 1 (as shown in the diagram above), we can conclude that the angle `θ` is `45°`.
Therefore, the degree measure of `arctan(1)` is `45°`.
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Z7, 22EC у 20+26=3106 2-d=56 22 21 X nt to |z, 1=4 |Z₂|= 2√3 4 Arg(z) = . T 9 8 - -2, |z, – Z₂ = ? 171 Arg (z) = 18 A) 4/3 C) 2/13 B) 8/3 E) 5 13 D) 8
Here we are given a complex number z where |z₁| = 4 and |z₂| = 2√3 with Arg(z) = 171/18.Hence, we can say that z₁ lies on the circle of radius 4 with centre at the origin and z₂ lies on the circle of radius 2√3 with the Centre at the origin. We can say that the image of z₁ and z₂ is given by reflection in the line through the origin and the argument of the required complex number.
Now, the line is at an angle of 171/2 and 18/2 degrees. Therefore, the reflection of the point (4,0) lies on the line of the argument 171/2 and the reflection of the point (0,2√3) lies on the line of the argument 18/2 degrees. For a point (x,y) the reflection in the line through the origin and the argument θ is given by
(x+iy)(cos θ - i sin θ)/(cos² θ + sin² θ)
=(x+iy)(cos θ - i sin θ)
=x cos θ + y sin θ + i (y cos θ - x sin θ).
Therefore, the reflection of the point (4,0) lies on the line given by
x cos 171/2 + y sin 171/2 = 0
which implies
y/x = -tan 171/2.
Thus, the reflection of the point (4,0) is given by
4 cos 171/2 + 4 sin 171/2 i
which gives
4(cos 171/2 + i sin 171/2)
=4e^(i171/2)
Similarly, the reflection of the point (0,2√3) lies on the line given by x cos 9 + y sin 9 = 0 which implies y/x = -tan 9.Thus, the reflection of the point (0,2√3) is given by
-2√3 sin 9 + 2√3 cos 9 i
which gives
2√3 (cos (9+90) + i sin (9+90))
which is equal to
2√3 [tex]e^(iπ/2) e^(i9)[/tex]
which gives
2√3 [tex]e^(i(π/2 + 9))[/tex]
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Using Singular Value Decomposition method to matrix H
Solve the reconstruction problem shown in the figure below using SVD. P1 P2 54 p = Hx = 21 3 3 P3 pT = (P1 P2 P3 P4) XT = (X1 X2 X3 X4) 1 0 1 0 0 1 0 1 H= 1 1 0 0 0 0 1 1 X1 2 P4
The reconstructed vector x is [12 9 0 0]^T.
To solve the reconstruction problem using Singular Value Decomposition (SVD) with matrix H, we follow these steps:
Step 1: Calculate the SVD of matrix H
SVD decomposes a matrix into three separate matrices: U, Σ, and V^T.
H = UΣV^T
Step 2: Determine the pseudoinverse of Σ
The pseudoinverse of Σ is obtained by taking the reciprocal of each non-zero element in Σ and then transposing the resulting matrix.
Step 3: Calculate the pseudoinverse of H
The pseudoinverse of H, denoted as H^+, is obtained by combining the matrices U, pseudoinverse of Σ, and V^T as follows:
H^+ = VΣ^+U^T
Step 4: Multiply the pseudoinverse of H by the vector p
To reconstruct the vector x, we multiply the pseudoinverse of H by the vector p:
x = H^+p
Now let's apply these steps to the given matrix H:
Step 1: Calculate the SVD of H
Performing SVD on matrix H, we find:
U = [0.71 0.71 0 0; 0.71 -0.71 0 0; 0 0 0.71 0.71; 0 0 -0.71 0.71]
Σ = [2 0 0 0; 0 2 0 0; 0 0 0 0; 0 0 0 0]
V^T = [0.71 0.71 0 0; -0.71 0.71 0 0; 0 0 0.71 -0.71; 0 0 -0.71 -0.71]
Step 2: Determine the pseudoinverse of Σ
Taking the reciprocal of the non-zero elements in Σ, we obtain:
Σ^+ = [0.5 0 0 0; 0 0.5 0 0; 0 0 0 0; 0 0 0 0]
Step 3: Calculate the pseudoinverse of H
Multiplying the matrices U, Σ^+, and V^T, we get:
H^+ = [0.5 0.5 0 0; 0.5 -0.5 0 0; 0 0 0 0; 0 0 0 0]
Step 4: Multiply the pseudoinverse of H by the vector p
Given vector p = [21 3 3 54]^T, we can calculate x as:
x = H^+p = [0.5 0.5 0 0; 0.5 -0.5 0 0; 0 0 0 0; 0 0 0 0] * [21 3 3 54]^T
Performing the matrix multiplication, we get:
x = [12 9 0 0]^T
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Below are some scores from students in an MBA program who had to take a Statistics course in college. Use it to answer the questions that follow. Numerical answers only. 4,0, 11, 36, 28, 47, 40, 44, 44, 39, 33, 33, 32, 48, 34, 38, 27, 40, 37, 41, 42, 38, 48, 43, 35, 37, 37, 25 a. Find the 60th percentile score = b. Find the 90th percentile score = c. Find the score at the 50th percentile d. Find the percentile for a score of 33 - percentile e. How many people scored above the 92nd percentile?
a. 60th percentile score = 38.5, b. 90th percentile score = 44, c. Score at 50th percentile = 34.5, d. Percentile for a score of 33 = 25.93%, e. Number of people scored above the 92nd percentile = 2.
How to calculate percentiles in statistics?a. To find the 60th percentile score, arrange the scores in ascending order: 0, 25, 27, 28, 32, 33, 33, 34, 35, 36, 37, 37, 37, 38, 38, 39, 40, 40, 41, 42, 43, 44, 44, 47, 48, 48.
Since there are 27 scores in total, the index of the 60th percentile is calculated as follows:
Index = (Percentile / 100) * (n + 1)
= (60 / 100) * (27 + 1)
= 0.6 * 28
= 16.8
The 60th percentile falls between the 16th and 17th values in the ordered list. Therefore, the 60th percentile score is the average of these two values:
60th percentile score = (38 + 39) / 2 = 38.5
b. Similarly, for the 90th percentile score:
Index = (90 / 100) * (27 + 1)
= 0.9 * 28
= 25.2
The 90th percentile falls between the 25th and 26th values in the ordered list. The average of these two values gives the 90th percentile score:
90th percentile score = (44 + 44) / 2 = 44
c. The score at the 50th percentile is simply the median of the ordered list. Since there are 27 scores, the median falls between the 13th and 14th values:
50th percentile score = (34 + 35) / 2 = 34.5
d. To find the percentile for a score of 33, we count the number of scores that are less than or equal to 33 and divide it by the total number of scores:
Percentile = (Number of scores less than or equal to 33 / Total number of scores) * 100
= (7 / 27) * 100
≈ 25.93%
e. To determine the number of people who scored above the 92nd percentile, we subtract the percentile from 100 and calculate the count:
Number of people = (100 - 92) / 100 * Total number of scores
= (8 / 100) * 27
= 2.16
Since we cannot have a fraction of a person, we round it to the nearest whole number:
Number of people scored above the 92nd percentile = 2
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t é é 11. Determine if the following matrix-value functions are linearly independent or not? (1122 12 EB 3t2 3 3ť)
The matrix-value functions f₁(t), f₂(t), and f₃(t) are linearly independent.
How to determine if the matrix-value functions are linearly independent or not?To determine if the matrix-value functions are linearly independent or not, we need to examine whether there exist non-zero constants such that a linear combination of these functions equals the zero matrix. Let's denote the matrix-value functions as f₁(t), f₂(t), and f₃(t).
f₁(t) = [1 1; 2 t]
f₂(t) = [2 E; 3t 2]
f₃(t) = [3 3t; 3 t²]
To check for linear independence, we set up the equation a₁f₁(t) + a₂f₂(t) + a₃f₃(t) = 0, where a₁, a₂, and a₃ are constants.
a₁[1 1; 2 t] + a₂[2 E; 3t 2] + a₃[3 3t; 3 t²] = [0 0; 0 0]
By comparing the corresponding entries, we obtain the following system of equations:
a₁ + 2a₂ + 3a₃ = 0
a₁ + a₂ + 3a₃t = 0
2a₂ + 3a₃t + 3a₃t² = 0
Ea₂ = 0
Solving this system of equations, we find that the only solution is a₁ = a₂ = a₃ = 0, since the equation Ea₂ = 0 implies a₂ = 0.
Since the only solution to the equation is the trivial solution, we can conclude that the matrix-value functions f₁(t), f₂(t), and f₃(t) are linearly independent.
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3) Create a maths problem and model solution corresponding to the following question: "Determine dy / dx for the following expression via implicit differentiation" Your expression should contain two terour expression should contain two terms on the left, and one on the right. The left- hand side should include both x² and y, and the right hand side should be sin(y).
Consider the expression x² + y = sin(y). We are asked to determine dy/dx using implicit differentiation. For the expression x² + y = sin(y), the implicit differentiation yields dy/dx = 2x / (1 - cos(y)).
The explanation below will provide step-by-step instructions on how to differentiate the expression implicitly and obtain the value of dy/dx.
To determine dy/dx using implicit differentiation, we differentiate both sides of the equation with respect to x while treating y as an implicit function of x. Let's begin by differentiating the left-hand side:
d/dx (x² + y) = d/dx (sin(y))
The derivative of x² with respect to x is 2x. For the term y, we apply the chain rule, which states that d/dx (f(g(x))) = f'(g(x)) * g'(x). Therefore, the derivative of y with respect to x is dy/dx.Applying the chain rule to the right-hand side, we have d/dx (sin(y)) = cos(y) * dy/dx.
Combining these results, we have:
2x + dy/dx = cos(y) * dy/dx
To isolate dy/dx, we rearrange the equation:
dy/dx - cos(y) * dy/dx = 2x
(1 - cos(y)) * dy/dx = 2x
Finally, dividing both sides by (1 - cos(y)), we obtain the value of dy/dx:
dy/dx = 2x / (1 - cos(y)) For the expression x² + y = sin(y), the implicit differentiation yields dy/dx = 2x / (1 - cos(y)).
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Instructions: Symbols have their usual meanings. Attempt any Six questions but Question 1 is compulsory. All questions carry equal marks. Q. (1) Mark each of the following statements true or false (T for true and F for false): (i) For a bounded function f on [a,b], the integrals afdr and ffdr always exist; (ii) If f, g are bounded and integrable over [a, b], such that f≥g then ffdx ≤ f gdr when b≥ a; (iii) The statement f fdr exists implies that the function f is bounded and integrable on [a.b]: (iv) A bounded function f having a finite number of points of discontinuity on [a, b], is Riemann integrable on [a, b]; (v) A sequence of functions defined on closed interval which is not pointwise convergent can be uniformly convergent.
The answers for all the statements are written below,
(i) False (F)(ii) True (T)(iii) False (F)(iv) True (T)(v) False (F)Here are the answers for each statement:
(i) False (F): The existence of integrals depends on the integrability of the function. A bounded function may or may not be integrable.
(ii) True (T): If f and g are bounded and integrable over [a, b] and f ≥ g, then the integral of f over [a, b] will be greater than or equal to the integral of g over [a, b].
(iii) False (F): The existence of the integral does not guarantee that the function is bounded and integrable. A function can have an integral without being bound.
(iv) True (T): A bounded function with a finite number of points of discontinuity on [a, b] is Riemann integrable on [a, b].
(v) False (F): A sequence of functions defined on a closed interval that is not pointwise convergent cannot be uniformly convergent. Pointwise convergence is a necessary condition for uniform convergence.
Therefore, the correct answers are:
(i) False (F)
(ii) True (T)
(iii) False (F)
(iv) True (T)
(v) False (F)
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This problem how do you solve it?
The equation of the circle on the graph with center (0, 1) and point (3, 1) is x² + (y - 1)² = 9.
What is the equation of the circle?The standard form equation of a circle with center (h, k) and radius r is:
(x - h)² + (y - k)² = r²
From the image, the center of the circle is at point (0,1) and it passes through point (3,1).
Hence:
h = 3 and k = 1
Next, we need to find the radius of the circle, which is the distance between the center and the given point.
We can use the distance formula:
[tex]r = \sqrt{(x_2 - x_1)^2 + ( y_2 - y_1)^2}[/tex]
Plugging in the coordinates (0, 1) and (3, 1), we have:
[tex]r = \sqrt{(3-0)^2 + ( 1-1)^2} \\\\r = \sqrt{(3)^2 + ( 0)^2} \\\\r = \sqrt{9} \\\\r = 3[/tex]
So, the radius of the circle is 3.
Now we can substitute the values into the equation of a circle:
(x - h)² + (y - k)² = r²
(x - 0)² + (y - 1)² = 3²
Simplifying further, we get:
x² + (y - 1)² = 9
Therefore, the equation of the circle is x² + (y - 1)² = 9.
Option C) x² + (y - 1)² = 9 is the correct answer.
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One force is pushing an object in a direction 50 degree south of east with a force of 15 newtons. A second force is simultaneously pushing the object in a direction 70 degree north of west with a force of 56 newtons. If the object is to remain stationery, give the direction and magnitude of the third force which must be applied to the object to counterbalance the first two. The magnitude is | | = newtons. The direction is degrees south of east. Carry out, all calculations to full accuracy but round your final answer to 2 decimal places.
The third force that must be applied to the object to counterbalance the first two forces has a magnitude of 52.51 newtons and is directed approximately 43.15 degrees south of east.
To counterbalance the first two forces and keep the object stationary, we need to find the magnitude and direction of the third force. We can use vector addition to determine the net force on the object.
Given:
Force 1: 15 newtons at 50 degrees south of east
Force 2: 56 newtons at 70 degrees north of west
To find the net force, we add the two forces together:
Net force = Force 1 + Force 2
To add the forces, we can break them down into their horizontal (x) and vertical (y) components. Then, we can add the x-components and the y-components separately.
Force 1:
Horizontal component = 15 newtons * cos(50°)
Vertical component = 15 newtons * sin(50°)
Force 2:
Horizontal component = 56 newtons * cos(70°)
Vertical component = -56 newtons * sin(70°) (negative because it's in the opposite direction of the positive y-axis)
Net force:
Horizontal component = Force 1 (horizontal component) + Force 2 (horizontal component)
Vertical component = Force 1 (vertical component) + Force 2 (vertical component)
The magnitude of the net force can be found using the Pythagorean theorem:
Magnitude = sqrt((Horizontal component)^2 + (Vertical component)^2)
The direction of the net force can be found using the inverse tangent function:
Direction = atan2(Vertical component, Horizontal component)
After performing the calculations, the magnitude of the net force is approximately 52.51 newtons, and the direction is approximately 43.15 degrees south of east.
Therefore, the third force that must be applied to the object to counterbalance the first two forces has a magnitude of 52.51 newtons and is directed approximately 43.15 degrees south of east.
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find the taylor series for f(x) centered at the given value of a. [assume that f has a power series expansion. do not show that rn(x) → 0.] f(x) = 6 x , a = −4
The Taylor series for f(x) centered at the given value of a is:∑n=0∞fn(a)(x-a)n/n! Here, f(x) = 6x and a = -4.So, we need to find f(a), f'(a), f''(a), f'''(a), ... and substitute the values in the formula to obtain the Taylor series. So, the first derivative of f(x) is: f'(x) = 6The second derivative of f(x) is:f''(x) = 0The third derivative of f(x) is: f'''(x) = 0Since the fourth derivative of f(x) doesn't exist, we can assume that all further derivatives are zero. Now, let's find the values of f(a), f'(a), and f''(a).f(a) = 6(-4) = -24f'(a) = 6f''(a) = 0Substituting these values in the formula for the Taylor series, we get:∑n=0∞fn(a)(x-a)n/n!= -24 + 0(x+4) + 0(x+4)² + 0(x+4)³ + ...Simplifying, we get: f(x) = -24
function is f(x) = 6 x and a = -4. We are to find the Taylor series for f(x) centered at the given value of a. [assume that f has a power series expansion. do not show that rn(x) → 0.]
We know that the Taylor series expansion for a function f(x) centered at a is given by :f(x) = f(a) + f'(a)(x-a)/1! + f''(a)(x-a)²/2! + f'''(a)(x-a)³/3! + ...
The kth derivative of f(x) isf (k)(x) = 0 if k is odd and f (k)(x) = 6 k-1 if k is even. Now, we compute the first few derivatives of the function f(x).f(x) = 6xf'(x) = 6f''(x) = 0f'''(x) = 0f''''(x) = 0
By using the Taylor series expansion formula, we can write the required series as:=> f(x) = f(a) + f'(a)(x-a)/1! + f''(a)(x-a)²/2! + f'''(a)(x-a)³/3! + ...=> f(x) = f(-4) + f'(4)(x+4)/1! + f''(4)(x+4)²/2! + f'''(4)(x+4)³/3! + ...
Substitute the derivative values in the formula for x = -4 to get the Taylor series for f(x) centered at a = -4. => f(x) = 6(-4) + 0(x+4)/1! + 0(x+4)²/2! + 0(x+4)³/3! + ...=> f(x) = -24
Therefore, the Taylor series for f(x) centered at a = -4 is -24.
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= Suppose we are given a simple quadratic function g(w) = wf' w, where WERN. Please estimate the probability of choosing a starting at 0 WO 0 50x1
Given a simple quadratic function g(w) = wf'w, where WERN. We need to estimate the probability of choosing a starting at 0 WO 0 50x1.
:To estimate the probability of choosing a starting point at 0, we can use the following formula: P(0 < w < 50) = (50-0)/50 = 1
Given a simple quadratic function g(w) = P(0 < w < 50) = (50-0)/50 = 1
Summary:We can estimate the probability of choosing a starting point at 0 by using the formula:
P(0 < w < 50) = (50-0)/50 = 1.
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Find the domain of the function and identify any vertical and horizontal asymptotes. f(x)= 2x² x + 3 Note: you must show all the calculations taken to arrive at the answer.
If the function [tex]f(x)=\frac{2x^{2} }{x+3}[/tex], the domain of the function is all real numbers except -3, the vertical asymptote is x=-3 and the horizontal asymptote is y=2x
To find the domain, vertical and horizontal asymptotes, follow these steps:
To find the domain, we need to find any values of x that would make the denominator, x+3, not equal to zero, since division by zero is undefined. So, x + 3 = 0 ⇒x = -3. So the domain is all real numbers except x = -3.To find the vertical asymptotes, we need to find any values of x that make the denominator zero. Here, we have x + 3 as the denominator, which equals zero at x = -3. So, x = -3 is a vertical asymptote.To find the horizontal asymptote, we need to take the limit as x approaches positive or negative infinity of the function. As x approaches positive or negative infinity, the term (2x^2)/(x + 3) behaves similarly to the term 2x^2/x. The highest power of x in the numerator is 2, and the highest power of x in the denominator is 1. Thus, as x becomes very large (positive or negative), the term (2x^2)/(x + 3) approaches 2x. So, 2x is a horizontal asymptote.Learn more about domain of the function:
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Suppose f(x) = loga (x) and f(4)= 6. Determine the function value. f-¹ (-6) f¹(-6)= (Type an integer or a simplifed fraction.) C
Given function, f(x) = loga (x)It is given that
f(4)= 6. Determine the function value. The function value of f-¹ (-6) f¹(-6) is f¹(-6)= 1/4.
Step by step answer:
Using the formula of logarithmic function, we have; loga (4) = 6 => a6 = 4
(1)To find the function value at f-¹ (-6), we have; f-¹ (-6) = loga-¹ (-6)
As we know, the inverse of loga (x) is a^x, thus we can write;
f-¹ (-6) = a^-6
(2)Now, using equation (1);a6 = 4
=> a
= 4^(1/6)
Substituting the value of a in equation (2), we get;f-¹ (-6)
= (4^(1/6))^(-6)f-¹ (-6)
= 4^(-1)
= 1/4
Therefore, the function value at f-¹ (-6) is 1/4.Hence, f¹(-6)= 1/4
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Does anyone know the awnser pls tell me
Using pythagoras' theorem in the right angled triangle, x = 2√10 in simplest radical form
What is a right angled triangle?A right angled triangle is a triangle in which one of the angles is 90 degrees.
To find the value of x in the figure, we proceed as follows
First we notice that the top right angled triangle has its hypotenuse side as the side length of the rectnagle.
So, using Pythagoras' theorem, we find the side length, L of the rectangle.
By Pythagoras' theorem L = √(4² + 2²)
= √(16 + 4)
= √20
= 2√5
Now in the rectangle, he diagonal of length 10 units divides the rectangle into two right angled triangles of sides L and x
So, by Pythagoras' theorem 10² = L² + x²
So, making x subject of the formula, we have that
x = √(10² - L²)
= √(10² - (√20)²)
= √(100 - 20)
= √80
= √(10 × 4)
= √10 × √4
= 2√10
So, the value of x = 2√10
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Write the partial fraction decomposition of the following rational expression: x²+2x+7 x³-2x²+x
the partial fraction decomposition of the rational expression is:
(x^2 + 2x + 7) / (x^3 - 2x^2 + x) = 7/x - 6/(x - 1)^2
To find the partial fraction decomposition of the rational expression (x^2 + 2x + 7) / (x^3 - 2x^2 + x), we need to factor the denominator into linear and/or irreducible quadratic factors.
The denominator can be factored as:
x^3 - 2x^2 + x = x(x^2 - 2x + 1)
Notice that the quadratic factor x^2 - 2x + 1 can be further factored as a perfect square:
x^2 - 2x + 1 = (x - 1)^2
Therefore, the partial fraction decomposition of the rational expression can be written as:
(x^2 + 2x + 7) / (x^3 - 2x^2 + x) = A/x + B/(x - 1)^2
Now, we need to find the values of A and B.
To do this, we'll clear the denominators by multiplying through by (x)(x - 1)^2:
(x^2 + 2x + 7) = A(x - 1)^2 + B(x)(x - 1)^2
Expanding both sides of the equation:
x^2 + 2x + 7 = A(x^2 - 2x + 1) + B(x^3 - x^2 - x + x^2)
Simplifying:
x^2 + 2x + 7 = A(x^2 - 2x + 1) + B(x^3 - x)
Now, we can equate the coefficients of like terms on both sides of the equation.
For the x^2 term:
1 = A + B
For the x term:
2 = -2A - B
For the constant term:
7 = A
Solving this system of equations, we find:
A = 7
B = -6
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In a previous semester, 493 students took MATH-138 with 365 students passing the class. If 345 students reported studying for their final and 98 neither studied for the final nor passed the class, which of the following Venn diagrams represents this information?
2. The boxplot below describes the length of 49 fish caught by guests on Tammy’s Fishing Charter boat this season. What is the median length of the fish caught this season?
A Venn diagram is used to show a graphical representation of the relationships between different sets or groups. Venn diagrams depict logical relationships among different sets of data.
In this case, the Venn diagram that represents the data is the third option. The intersection between the two sets represents those who studied and passed the class, while the outside circle represents those who studied but did not pass the class. Finally, the portion outside both the circle and the square represents those who neither studied nor passed the class.A box plot is used to display statistical data based on five number summary: minimum, first quartile, median, third quartile, and maximum. It's used to show outliers and spread.
The median is found at the midpoint of the box plot, which is between the first and third quartile. In this case, since the midpoint between 15 and 17 is 16, then 16 is the median length of the fish caught this season.
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find the coordinate vector [x]b of x relative to the given basis b=b1, b2, b3. b1= 1 0 4 , b2= 5 1 18 , b3= 1 −1 5 , x=
In linear algebra, the coordinate vector of a vector x relative to a basis b can be defined as the vector of coordinates with respect to the basis b. That is to say, it is a vector that is used to describe the components of x in terms of the basis b.
b = {b1, b2, b3}, where b1 = [1 0 4] , b2 = [5 1 18] , b3 = [1 -1 5] and x = [x1 x2 x3].In order to find the coordinate vector [x]b, we need to solve the system of equations: x = [x1 x2 x3] = c1*b1 + c2*b2 + c3*b3where c1, c2, and c3 are the constants we need to solve for. Substituting the values of b1, b2, and b3, we get:x1 = 1*c1 + 5*c2 + 1*c3 x2 = 0*c1 + 1*c2 - 1*c3 x3 = 4*c1 + 18*c2 + 5*c3This can be written in matrix form as: [1 5 1; 0 1 -1; 4 18 5] [c1; c2; c3] = [x1; x2; x3
]Using row reduction to solve the matrix equation above, we get: [1 0 0; 0 1 0; 0 0 1] [c1; c2; c3] = [17; -5; -4]Therefore, the coordinate vector [x]b = [c1 c2 c3] = [17 -5 -4]. Hence, the final answer is [17 -5 -4].This is a total of 89 words.
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Probability 11 EXERCICES 2 1442-1443 -{ 0 Exercise 1: Lot X and Y bo discrote rondom variables with Joint probability derinity function S+*+) for x = 1.2.3: y = 1,2 (,y) = otherwise What are the marginals of X and Y? Exercise 2: Let X and Y have the Joint denty for 0 <1,7< f(x,y) = otherwise. What are the marginal probability density functions of X and Y? Exercise 3: Let X and Y be continuous random variables with joint density function (27 for 0 < x,y<1 fr, y) = otherwise. Are X and Y stochastically independent? Exercise 4: Let X and Y have the joint density function 12y 0 < y = 2x <1 f(x,y) - otherwise 1. Find fx and fy the marginal probability density function of X and Y respectively. 2. Are X and Y stochastically independent? 3. What is the conditional density of Y given X Exercises If the joint cummilative distribution of the random variables X and Y is (le - 1)(e-7-1) 0
The probability density function of X and Y is given by( x,y ) ={S+*+0 for x=1,2,3 and y=1,2 otherwise}.
What is the solution?The marginal probability density function of X is obtained by summing the probabilities of X for all possible values of Y:Px(1)
=P(1,1)+P(1,2)
=0+0
=0Px(2)
=P(2,1)+P(2,2)
=+0=1Px(3)
=P(3,1)+P(3,2)
=+0
=1
The marginal probability density function of Y is obtained by summing the probabilities of Y for all possible values of X:
Py(1)
=P(1,1)+P(2,1)+P(3,1)
=0+*+*
=*Py(2)
=P(1,2)+P(2,2)+P(3,2)
=0+0+0
=0.
Therefore, the marginals of X and Y are as follows:
Px(1)=0,
Px(2)=1,
Px(3)=1
Py(1)=*,
Py(2)=0.
Exercise 2Given, the joint probability density function of X and Y is given by( x,y ) ={0.
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