For each recursively-defined sequence below, write the first few term. Then use the terms to write an explicit equation.

a. a_1 = 15
a_n+1 = a_n - 3


b. t(n+1) = 1/3*t(n)
t(1)= 108

Answers

Answer 1

Answer:

Step-by-step explanation:

a_1 = 15

a_2 = a_1  - 3

a_2 = 15 - 3

a_2 = 12

a_3 = a_2  - 3

a_3 = 12 - 3

a_3 = 9

a_4 = a_3 - 3

a_4 = 9 - 3

a_4 = 6

a_5 = 3

a_6 = 0                  I'm leaving these last two to expand

a_n = a1 - (n - 1)*d

a_n = 15 - (n - 1)*3

a_n = 15 - 3n + 3

a_n = 18 - 3n

Example

a_6 = 18 - 3*6

a_6 = 0

Problem B

t(1) = 108

t(1 + 1) = 1/3 * 108

t(2) = 36

t(3) = 1/3 * t2

t(3) = 1/3 * 36

t(3) = 12

t(4) =1/3 (t(3))

t(4) = 1/3 * 12

t(4) = 4

t(5) = t4 / 3

t(5) = 4 / 3

t(5) = 1.3333333

So the explicit definition is

t(n) = 108 (1/3)^(n - 1)            You could simplify this a little bit by realizing that 108 is made of three 3s.

t(n) = 4 * 3^3 * (1/3)^(n - 1)

t(n) = 4 * (1/3) ^ (n - 4)

Example

t(5) = 108 (1/3)^4

t(5) = 108(1/81)

t(5) = 1.3333333

And using the simplified formula, you get.

t(5) = 4 * (1/3)^1

t(5) = 1.333333 which is the same thing as the original result.

Answer 2

Answer:

see explanation

Step-by-step explanation:

(a)

Using the recursive rule and a₁ = 15 , then

a₂ = a₁ - 3 = 15 - 3 = 12

a₃ = a₂ - 3 = 12 - 3 = 9

a₄ = a₃ - 3 = 9 - 3 = 6

The sequence is 15, 12, 9, 6, ....

This is an arithmetic sequence with n th term ( explicit rule )

[tex]a_{n}[/tex] = a₁ + (n - 1)d

where a₁ is the first term and d the common difference

Here a₁ = 15 and d = - 3 , then

[tex]a_{n}[/tex] = 15 - 3(n - 1) = 15 - 3n + 3 = 18 - 3n

----------------------------------------------------------------------

(b)

Using the recursive rule and t₁ = 108 , then

t₂ = [tex]\frac{1}{3}[/tex] t₁ = [tex]\frac{1}{3}[/tex] × 108 = 36

t₃ = [tex]\frac{1}{3}[/tex] t₂ = [tex]\frac{1}{3}[/tex] × 36 = 12

t₄ = [tex]\frac{1}{3}[/tex] t₃ = [tex]\frac{1}{3}[/tex] × 12 = 4

The sequence is 108, 36, 12, 4, ......

This is a geometric sequence with n th term

[tex]t_{n}[/tex] = t₁[tex](r)^{n-1}[/tex]

where t₁ is the first term and r the common ratio

Here t₁ = 108 and r = [tex]\frac{1}{3}[/tex] , then

[tex]t_{n}[/tex] = 108 [tex](\frac{1}{3}) ^{n-1}[/tex]


Related Questions

Given that h(x) = -3x - 7, what is h(-4)?

Answers

Answer:

x=−3x−7whatish(−4)

Step 1: Flip the equation.

28ah2istw−3x=x

Step 2: Add 3x to both sides.

28ah2istw−3x+3x=x+3x

28ah2istw=4x

Step 3: Divide both sides by 28h^2istw.

28ah2istw

28h2istw

=

4x

28h2istw

a=

x

7h2istw

Answer:

a=x7h2istw

Answer:

x = -1 when h(x) = -4

Step-by-step explanation:

Solve for x when h(x)= -4

h(x) = -3x - 7

-3x - 7 = -4

     +7    +7

-3x = 3

divide -3 by 3

-3x/3 = 3/-3

x = -1

You can check this by plugging the -1 into x

-3x - 7

-3(-1) - 7

3 - 7 = -4

Which of the following answer is equivalent to this expression 8+12x

Answers

Answer:

what is the answer choices

Step-by-step explanation:

answer:

4(2+3x)

step-by-step explanation:

4(4+3x)=16+12x

4(x+3x)=16x

3(5+9x)=15+27x

4(2+3x)=8+12x

how to solve 4(2+3x):

4(2+3x)

=(4)(2+3x)

=(4)(2)+(4)(3x)

=8+12x

good luck :)

hopefully, this helps

have a nice day !

Malcolm buys a 5/6 pound of black beans and a 3/4 pound bag of pinto beans. How many pounds of beans does Malcolm buy in all?​

Answers

Answer:

1 7/12

Step-by-step explanation:

5/6+3/4=10/12+9/12 = 19/12 or 1 7/12

Is the relation a function?

The relation can be represented by the ordered pairs (2, 1), (3, 4), (5, 19), and (8, 7).

Answers

2...5......4444444.....4444445.
Yes it is a function. The x value does not repeat.

Choose the proper steps needed to solve the following equation and give the
solution for k:
-5k +2k = 45.
1) subtract 2k, then divide by -5
2) combine like terms, then divide by 3
combine like terms, then divide by -3
4) combine like terms, then add 3

Answers

Answer:

1

Step-by-step explanation:

subtract 2k, then divide by -5

PLEASE HEEEEEEEEEEEEEELLLLLLLLLPPPPPPP

Answers

Answer:

10, 32, 25

hope this helps!

Answer:

10, 32, 25

Step-by-step explanation:

it's half of the numbers

4 is half of 8

10 is half of 20

16 is half of 32

25 is half of 50

If the volume of an object is 5 cm3 and its mass is 55 g, what is its density?
A. 11 g/cm^3
C. 50 cm^3/g
С.
В. 15 g/cm
D. 275 g/cm^3

Answers


D

Density= mass x volume

So plug in your variables for mass and volume:

Density= (55)(5)

Density= 275 :))

A rectangle is 6 centimeters longer than it is wide.
Its length and width are both increased by
4 centimeters.

Answers

Answer and Step-by-step explanation:

The length = 6 + w

The width = w

Rectangle when the length and width is increased by 4 centimeters.

length = 10 + w

width = 4 + w

#teamtrees #PAW (Plant And Water)

Daniel had $30 to spend at the fair admission to the fair is $7 and rides cost $1.50 each write an inequality that represents Daniels situation

Answers

Answer:

1.5r + 7 ≤ 30

Step-by-step explanation:

r = rides rode (that's sounds weird but funny lol)

Admission costs $7. Each ride costs $1.50, so the money he spends has to be less than or equal to $30

HELP!!
A right triangle has a hypotenuse measuring 25 centimeters and one leg measuring 7 centimeters. What is the length in centimeters, of the other leg of
the right triangle?
26 cm
O 576 cm
674 cm
24 cm

Answers

24 cm bc 25 squared is 625 and 7 squared is 49. 625-49=576. Now the square root of 576 is 24 and boom your answer

The volume of this sphere is 15500cm3.
Work out the length of the radius,
r
.
Give your answer rounded to 1 DP

Answers

Answer:

r = 15.5

Step-by-step explanation:

4/3 pi r^3 = 15500 cm^3

r^3 = 15500 ÷ (4/3 pi)

r^3 = 3700.35

r = cube root of 3700.35

r = 15.467

r = 15.5

Answer:

4/3 π r³= 15500

r³=15500×3/4×7/22

r≈15.2 cm

Step-by-step explanation:

Mia is rolling a pair of 666-sided dice.
P(n)P(n)P, left parenthesis, n, right parenthesis models the probability of the event that the sum of the dice is nnn.
Which number type is more appropriate for the domain of PPP?
Choose 1 answer:

Answers

Answer:

The domain of P is given by,

{n | n ∈ N, 2 ≤ n ≤ 12}

Step-by-step explanation:

A perfect die is perfectly cubic in shape with one of the integers 1,2,3,4, 5 or 6 in each of it's 6 faces and the digits on any two faces are different.

Now, two dice are rolled and P(n) models the probability of the event that the sum on the faces of the two dice is n.

Hence, the domain of P is given by,

{n | n ∈ N, 2 ≤ n ≤ 12}

Answer:

integers

2<_x<_12

Step-by-step explanation:

5 couples want to have their pictures taken. In how many ways can they arrange themselves in a row if couples must stay together

Answers

Can u explain it more?

PERMUTATION is my answer...mm

2. A spinner is made up of three colored sections. Each time it is pon the colorit lands on is recorded.
The table shows the results.
Spinner Results
COLOR
FREQUENCY
15
green
orange
21
red
14
Based on the data in the table what is the probability that the result of the next spin will be red?
O A И
O

Answers

Answer:

14/50

Step-by-step explanation:

14/50

WILL GIVR YOU BRAINLEST PLEASE HELP ASAP!
Lines & and m are intersected by transversal t and e // m.

1
5
6
8
By which postulate or theorem is 23* 26?
A. Alternate Exterior Angles Theorem
O
B. Alternate Interior Angles Theorem
o
C. Corresponding Angles Theorem
D. Same-Side Interior Angles Postulate

Answers

Sorry the question you typed is kinda messy. But I see you have typed “23* 26” I’m gonna assume you’re asking which postulate or theorem is angle 2 and angle 3, and angle 2 and angle 6. So angle 2 and 3 are vertical angles. Angle 2 and 6 are corresponding angles. If that wasn’t what you wanted, please let me know in the comments so I can understand your problem clearly and solve it.

Jillian lands the beanbag in the hole in about half of her attempts in a beanbag toss game. How can she predict the number of times she will get the beanbag in the hole in her next 5 attempts using a coin toss?

Answers

Step-by-step explanation:

So in the case of Jillian, landing the beanbag in the cornhole is 1/2. So this is just like flipping a coin.

the first time she tosses the beanbag she has a 1/2 chance of getting it in the cornhole and 1/2 chance of getting it outside the cornhole. And since she needs to get 5 tosses in a row into the cornhole, we multiply

1/2(1/2)(1/2)(1/2)(1/2)=1/32

I hope that helps :)

A store sells 0,1,2,3,4,5,6,7,8 items daily with the same probability. Find the probability that one day you will sell more than 3 items.

Answers

Answer:

5/9

Step-by-step explanation:

Each number - 0 through 8 - has an equal probability of being the number of sales on a particular day.

There are 9 possibilities of equal likelihood, so each one has a probability of 1/9.

So we want the probability of the number of sales being 4, 5, 6, 7, or 8.

Those are 5 out of the 9 possibilities, so 5(1/9) = 5/9.

Which of the g-values satisfy the following inequality? 7 > 12- 9 Choose all answers that apply:
g=4
g=5
g = 6​

Answers

Answer:

the answer is g=6

Step-by-step explanation:

because I know

The red thing at the top is a right angle. Find the missing side lengths and leave answers as radicals in simplest form ILL GIVE BRAINLIEST

Answers

Answer:

A. x = 13

y = (13√3)/3

Step-by-step explanation:

Reference angle = 30°

Hypotenuse = (26√3)/3

Adjacent = x

Opposite = y

✔️Apply CAH to find x:

Cos 30 = Adj/Hyp

Cos 30 = x/(26√3)/3

√3/2 = x*3/(26√3) (cos 30 = √3/2)

√3/2 = 3x/(26√3)

Cross multiply

2*3x = (26√3)*(√3)

6x = 26*3

6x = 78

x = 78/6

x = 13

✔️Apply SOH to find y:

Sin 30 = Opp/Hyp

Sin 30 = y/(26√3)/3

Sin 30 = y*3/(26√3)

½ = 3y/(26√3) (sin 30 = ½)

Cross multiply

2*3y = (26√3)*1

6y = 26√3

Divide both sides by 6

y = (26√3)/6

y = (13√3)/3

erica watch 1/2 of a movie in the morning and she watched some at night and by the end of the day she still had 1/3 of left how much did she watch at night?​

Answers

Convert to equivalent fractions to see
Both bottom s can be 6
So times the half by 3
And times the third by 2
1/2=3/6
1/3=2/6
So she has a total of 5/6 of the movie accounted for...
So the left over is 1/6
1/6 at nighttime

Suppose there is a 1.9°F drop in temperature for every thousand feet that an airplane climbs into the sky. If the temperature on the ground is 48.8°F​, what will be the temperature when the plane reaches an altitude of 8,000 ft​?

Answers

Answer:

33.6 degrees F

Step-by-step explanation:

8000/1000 = 8

8(1.9) = 15.2 degree drop

48.8 - 15.2 = 33.6 degrees F

A sequence of distinct vertices such that two consecutive vertices are adjacent is known as path.
Seled one.
True
False​

Answers

HEY MATE THIS IS UR ANSWER

TRUE.

When two vertices are joined by an edge, we say those vertices are "adjacent". Adjacent vertices are vertices that are joined by an edge, non-adjacent vertices are vertices not joined by an edge.

if you say i need help i will be their right away because your in danger

Answers

Answer:

oh wow thx

Step-by-step explanation:

Janiya just turned 18 years old. She spent 4/9 of her life in NY. How many years did Janiya live in NY? *

Answers

4/9 x 2 = 8/18 so 8 yrs of her life

what is the ratio in simplest form between the length of a side in ABC and the length of its corresponding side in DEF

A. 1/1
B. 1/3
C. 3/1
D. 1/2

Answers

Answer:

3/1

Step-by-step explanation:

hope you got the correct answer

thankyou.

PLEASE HELP ITS DUE IN 7 MINUTES! A rectangle is formed. The length is 56 inches and the width is 42 inches. Find the length of the diagonal from the choices below.
A. 82.5 inches.
B. 70 inches.
C. 90 inches.
D. 60 inches.

Answers

Answer:

TO be honest the answer is 60.

Step-by-step explanation:

Could it be true or am I wrong and if so why?

Answers

Answer:

False

Step-by-step explanation:

Its not a repeating Decimal

I have no idea what to do. Pls help me

Answers

for the first one all u do is 5 times 2 = 10 + 2 = 12. the denominator stays the same so 12/5. then you do the same thing to the other fraction. 3 times 1 = 3 + 2 = 5. the denominator stays the same so your fraction is 5/3. so the answer is 12/5 times 5/3.

hope this helps !

convert 25/100 into percent

Answers

Answer:

[tex]0.25[/tex]

Step-by-step explanation:

1) Divide the numerator by 100.

[tex]0.25[/tex]

Therefor, 25/100 in percent will be 0.25% which is 25%.

Answer:

25 %

Step-by-step explanation:

A fraction consists of two numbers and a fraction bar:

25/100

The number above the bar is the numerator: 25

The number below the bar is the denominator: 100

Divide the numerator by the denominator to get fraction's value:

Val. = 25 ÷ 100

Introduction. Percent, p%

'Percent (%)' means 'out of one hundred':

p% = p 'out of one hundred',

p% is read p 'percent',

p% = p/100 = p ÷ 100.

Calculate the percent value:

25/100 =

25%;

Hope it is helpful....

last year hari was 4 feet tall, and this year he is 5 feet tall. what is the percent increase of his height?​

Answers

Answer:

75%

Step-by-step explanation:

hsjdidjdbdkosksksldmenk

Last year Hari was 4 feet tall, and this year he is 5 feet tall. There is a 25% increase in his height in one year.

What is a percent in math?

Percent, a relative value indicating the hundredth part of any amount. One percent (symbolized 1%) is the hundredth part; for that reason, 100 percent represents everything and 200 percent specifies two times the given amount.

Conclusion: The percentage can be calculated by dividing the value by the total value and then multiplying the result by 100. The formula used to calculate the percentage is: (value/total value)×100%.

let 4feet be 100% of his height.

4 - 100%

x% = (increased height/actual height) * 100

x% = (5/4) * 100

x% q= 125

percent increase of height = 125-100 = 25

learn more percentages here https://brainly.com/question/843074

#SPJ2

Other Questions
2/5+7/15 in its simplest form the effect of poverty on the south African economy To raise operating funds, Signal Aviation sold an airplane on January 1, 2018, to a finance company for $770,000. Signal immediately leased the plane back for a 13-year period, at which time ownership of the airplane will transfer to Signal. The airplane has a fair value of $800,000. Its cost and its book value were $600,000. Its useful life is estimated to be 15 years. The lease requires Signal to make payments of $102,771 to the finance company each January 1. Signal depreciates assets on a straight-line basis. The lease has an implicit rate of 11%.Required:Prepare the appropriate entries for Signal on: 1. January 1, 2018, to record the transaction 2. December 31, 2018, to record necessary adjustments Use the volume formula to find the volume of the prism.31 / 134 Maria purchase 1/2 lb of cheese for $3.50 at a farmers market what would be the cost for 4 lb of cheese *EXTRA PTS* how much salsa is missing from the jar Need Help ASAP Need help on whats shown in the picture. (07.01)Colton solved an equation incorrectly, as shown below:Step 1: x - 13 = 26Step 2: x = 26 - 13Step 3: x = 39Which statement best explains why Step 2 is incorrect in Colton's solution? (4points)He did not divide 26 by 13.He did not multiply 26 by 13.O He did not subtract 13 from 26.He did not add 13 to 26. Determine the slope-intercept equation of a line with a slope of 3/2 that passes through (2, -1). Amy needs to buy 12 notebooks and a pack of pens from the store. The pack of pens cost $2.50 and she has a budget of $30. Which inequality represents the situation if a representsthe maximum amount she can spend on each notebook?A 12.6 +2.50 > 30B) 12 +2.50.3 < 30C) 12. + 2.50 < 30D 12 +2.50 < 30 Which is one function of a weather balloon? A Enables forecasts 7 to 10 days in advance B measures conditions in the upper atmosphere See locate and track storms and follows the path of the storm systems c Uses mathematical equation to show what will happen if conditions change please hurry I really need help time is running out A ladder leans against a wall 6 ft above the ground. The base of the ladder is 3 ft from the wall. How long is the ladder? helpppppppppppppppppppppppppppppp Whats the best Wi-Fi name youve seen? how can we contribute to the control of climate change mZ1 =m2 2 = 58m2 3=m24=m2 5=m2 6=m2 7=m2 8 = help ASAP! Please! Ill mark brainliest PLEASE PLEASE I'm two steps from the edge, dont push me over it. Every girl is capable of murder, if you hurt her, watch out dont push me any further, your not the only one walking around with a loaded gun. My hands are clean, not yet a killer. Aint I your queen? But isnt she? But did you tell us? Shouldve known not to treat me like that. Just stop touching me, its unwanted, stop hurting me, its unnecessary. If you truly love me, prove it. Youre my f- brother, not a lover. CER: What is the purpose of Black History Month? Why is it important? Use at least three pieces of evidence. What year is 7 years after 2003