The sum of the first (n) terms of the sequence is given by the formula (given below) . If this sequence is a geometric progression, find q. If this sequence is an Arithmetic progression, find d​​

The Sum Of The First (n) Terms Of The Sequence Is Given By The Formula (given Below) . If This Sequence

Answers

Answer 1

Answer:Example 1:

Find the sum of the first 8 terms of the geometric series if a1=1 and r=2.

S8=1(1−28)1−2=255

Example 2:

Find S10 of the geometric sequence 24,12,6,⋯.

First, find r.  

r=r2r1=1224=12

Now, find the sum:

S10=24(1−(12)10)1−12=306964

Example 3:

Evaluate.

∑n=1103(−2)n−1

(You are finding S10 for the series 3−6+12−24+⋯, whose common ratio is −2.)

Sn=a1(1−rn)1−rS10=3[1−(−2)10]1−(−2)=3(1−1024)3=−1023  

In order for an infinite geometric series to have a sum, the common ratio r must be between −1 and 1.  Then as n increases, rn gets closer and closer to 0.  To find the sum of an infinite geometric series having ratios with an absolute value less than one, use the formula, S=a11−r, where a1 is the first term and r is the common ratio.

Example 4:

Find the sum of the infinite geometric sequence

27,18,12,8,⋯.

First find r:  

r=a2a1=1827=23

Then find the sum:

S=a11−r

S=271−23=81

Example 5:

Find the sum of the infinite geometric sequence

8,12,18,27,⋯ if it exists.

First find r:  

r=a2a1=128=32

Since r=32 is not less than one the series has no sum.

Step-by-step explanation:


Related Questions

how many 0.5-pound packages can be made with 7 pounds of sunflower seeds?

Answers

Answer:

14. :D

Step-by-step explanation:

A conveyor belt carries supplies from the first floor to the second floor, which is 22 feet higher. The belt makes a 60° angle with the ground. a. How long is the conveyor belt? Round your answer to the nearest foot. b. If the belt moves at 75 ft/min, how long does it take the supplies to move to the second floor? Round to the nearest tenth.

Answers

Answer:

a) 44[tex]\sqrt{3}[/tex]/3 feet

b) .3 minutes

Step-by-step explanation:

We know all three of the angles: 30 60 90. So we can divide 22 by [tex]\sqrt{3}[/tex], and then multiply that number by 2. We cannot have a radicand in the bottom, so multiply the denominator and numerator by

for b), simply divide a) by 75 ft/min, which is approximately  .3 minutes.

PLS ANSWER FAST!!!


a rate is a ratio that compares

A) a part to a part

B) a part to a whole

C) quantites with different units

D) quantities with the same units

Answers

Answer:

c

Step-by-step explanation:

A rate is a ratio that compares quantites with different units.

What is Ratio?

A ratio is an ordered pair of numbers a and b, written a / b where b does not equal 0.

A rate is a comparison of two quantities that have different units, such as miles per hour, dollars per gallon, or meters per second.

A rate can be expressed as a fraction or a ratio, with the numerator representing the quantity being measured and the denominator representing the unit of measurement.

Hence, a rate is a ratio that compares quantites with different units.

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If the school supply kit regularly cost $25 how much does it cost after the 20% discount

Answers

Percent Off Calculator 20% off 25 is 20.00 -

The amount of the school supply kit after the discounted price is $ 20

What is an Equation?

Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.

It demonstrates the equality of the relationship between the expressions printed on the left and right sides.

Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.

Given data ,

Let the amount of the school supply kit be A

The value of A is $ 25

The percentage discount of the school supply kit = 20 %

So , the value of the percentage amount is given by the equation

The cost of the school supply kit after discount = ( amount of the school supply kit - ( percentage discount of the school supply kit x amount of the school supply kit ) )

Substituting the values in the equation , we get

The cost of the school supply kit after discount = 25 - ( 20/100 x 25 )

The cost of the school supply kit after discount = 25 - ( 25 x 0.2 )

The cost of the school supply kit after discount = 25 - 5

The cost of the school supply kit after discount = $ 20

Therefore , the discounted price is $ 20

Hence ,

The amount of the school supply kit after the discounted price is $ 20

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What is the least positive integer divisible by each of 1, 3, 5, and 7?

Answers

Answer:

105

Step-by-step explanation:

You need the least common multiple of the 4 numbers. Since 3, 5, and 7 are prime numbers, the answer is their product.

LCM = 3 * 5 * 7 = 105

The least positive integer that is divisible by each of 1, 3, 5, and 7 is 105.

In order to solve the question, we simply have to find the lowest common multiple that is applicable to all the numbers that are given on the question.

In this case, the lowest common multiple can be gotten by multiplying the numbers be high will be:

= 1 × 3 × 5 × 7 = 105

Therefore, the number is 105.

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The difference of two numbers is 308. The smaller of the numbers is 730. What is
the other number?

Answers

Answer:

1038

Step-by-step explanation:

730+308= the big number

Answer:

1038

Step-by-step explanation:

There are 50 students in a class. If 14% are absent on a particular day, find the number of students present in the class. What percent were not absent?​

Answers

Answer:

i THINK 43% but im not for sure

Step-by-step explanation:

14% of 50 is 7

so 50-7=43

43(percent there)+7(percent gone)=50 (number of students)

SO 43% is still there.  

SORRY IF IM WRONG have a good night :)

please help me I dont know the answer​

Answers

Answer:

2.71

Step-by-step explanation:

Its as simple as plugging in the values of y and z.

THis would give you

      -1.46 + (-3.82) + 7.99

This plus^ you can think about having a 1 in front of it like

-1.46 + 1 (-3.82) +7.99

Multiple positive 1 with -3.82 1 times any value is that number, and positive times negative is negative. then looking like this:

-1.46 - 3.82 + 7.99 plug into a calculator and you get +2.71

Answer:

2.71

Step-by-step explanation:

We'll add the first value and the value in parentheses, being -3.82, then we'll add y, which is a negative because "-y", being -1.46. That becomes -5.28.

We'll then take our -5.28 and add 7.99, which will become 2.71.

Therefore, 2.71 is your answer.

Help asap it’s math and I’m not sure about this one

Answers

Answer:

1/2

Step-by-step explanation:

2(x+7) + 3(x+1)
pls help

Answers

Answer:  5x +17

Step-by-step explanation:

2(x +7 )  + 3(x +1)  Apply the distributive property to break it down

2(x) + 2(7) + 3(x) + 3(1)

2x + 14 + 3x + 3      Now combine like terms

  5x + 17

Answer:

2x+14+3x+3

5x+17

Step-by-step explanation:

2+2+4 because 1+1+1+1=4 easyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy

Answers

Yyyyyyyyeeeeessssss easy

Which one is correct? Please hurry :)

Answers

Answer:

A

Step-by-step explanation:

A car is traveling 60 miles per hour. How long will it take to travel 240 miles?​

Answers

Answer:

4 hours

Step-by-step explanation:

240 / 60 = 4

240/60= 4 so the answer is 4 hours

The sum of two numbers is 125. Their difference is 47. The two numbers are:
39 and 86.
40 and 85.
47 and 78.
None of these choices are correct.

Answers

Answer:

39 and 86.

Step-by-step explanation:

39 and 86 equal 125 when added. When 47 is subtracted from 86 you get 39.

Is 0.25 rounded to 0.3​

Answers

Answer: Yes, round it to the nearest tenth

A sweater is $43. It is on sale for 20% off. What is the final price? $34.40 $47 $8.60​

Answers

43 * 0.20 = 8.6 dollars off
43 - 8.6 = 34.40
Solution: $34.40

Answer:

34.40

Step-by-step explanation:

43×0.2 = 8.60

43-8.60= 34.40

if lines intersect, does that make it, one solution, no solution, or infinite solution?​

Answers

Answer:

one solution

Step-by-step explanation:

No solution is when they don't intersect at all. Infinite solutions is if the two lines are on top of each other.

Answer:

one solution

Step-by-step explanation:

if they intersect, they become one solution, if they don't intersect, than there are no solutions. If the graphs of the equations are the same, there are infinite solutions.

Does the table, graph, or equation represent a linear or nonlinear function? EMERGENCY I need help ​

Answers

Answer:

Nonlinear

Step-by-step explanation:

This is because the x^2. If there are any exponets, the equation would be considered nonlinear.

Hope this helps!

Find the area of the irregular figure.
2 in.
3 in.
5 in.
A = [ ? ]in.2
3 in.
2 in.
4 in.
4 in.

Answers

Answer:

area = 35 in²

Step-by-step explanation:

help meh please i need hell

Answers

Answer:

1 3/8

Step-by-step explanation:

Evaluate the expression x=4 , y=-2 , z=-3

Answers

Answer:

36

Step-by-step explanation:

I don’t know if this half the problem or something because you only need to know what a equals but...

1. Substitute x for 4 since x=4... so the equation would then be (4)^2+10(4)-20

2. You simplify so 4 squared is 16 because when you square something you times it by it self so 4^2 is simply 16 because 4*4=16 then 10*4 is 40 so then you get 16+40-20

3. So you can simplify that again to 56-20 and then to 36

Sorry I’m really bad at explaining but I hope this helps

equations with variables on both sides: decimals and fractions, algebra 2 0.5s + 1 = 7 + 4.5s

Answers

Final Answer: [tex]s = -\frac{3}{2}[/tex]

Steps/Reasons/Explanation:

Question: Equations with variables on both sides: decimals and fractions, algebra 2. [tex]0.5s + 1 = 7 + 4.5s[/tex].

Step 1: Subtract [tex]0.5[/tex] from both sides.

[tex]1 = 7 + 4.5s - 0.5s[/tex]

Step 2: Simplify [tex]7 + 4.5s - 0.5s[/tex] to [tex]7 + 4s[/tex].

[tex]1 = 7 + 4s[/tex]

Step 3: Subtract [tex]7[/tex] from both sides.

[tex]1 - 7 = 4s[/tex]

Step 4: Simplify [tex]1 - 7[/tex] to [tex]-6[/tex].

[tex]-6 = 4s[/tex]

Step 5: Divide both sides by [tex]4[/tex].

[tex]-\frac{6}{4} = s[/tex]

Step 6: Simplify [tex]\frac{6}{4}[/tex] to [tex]\frac{3}{2}[/tex].

[tex]-\frac{3}{2} = s[/tex]

Step 7: Switch sides.

[tex]s = -\frac{3}{2}[/tex]

~I hope I helped you :)~

What is the value of x^2 - 3y + 5x + 2 whenx = 7 and y = 4?

Answers

Answer:

74

Step-by-step explanation:

[tex]x^2 - 3y + 5x + 2 \\ \\ = {7}^{2} - 3(4) + 5(7) + 2 \\ \\ = 49 - 12 + 35 + 2 \\ \\ = 74[/tex]

At 5 p.M., the temperatures recorded at two weather stations in Antarctica are -6 degrees and 2 degrees. The temperature changes at the same constant rate, x degrees per hour, throughout the night at both locations. The temperature at the first station 3 hours after this recording is the same as the temperature at the second station 4 hours after this recording.

Answers

Answer:

- 8° per hour

Step-by-step explanation:

Given that:

Station A = - 6°

Station B = 2°

Rate of temperature change = x° / hour ; which is the same at both stations

Temperature at station A 3 hours after the recording is the same as the temperature in station B 4 hours after the recording ;

Temperature change in Station A:

-6 + 3x

Temperature change in station B:

2 + 4x

Temperature change in A = temperature change in B

-6 + 3x = 2 + 4x

Collect like terms

3x - 4x = 2 + 6

- x = 8

x = - 8

Hence, the rate of temperature change x in both stations is - 8° per hour

URGENT, PLEASE ANSWER.
-5 Solve the inequalities!
15 points if you answer and trolls will be reported.

Answers

Answer: x= -1

Step-by-step explanation:

1 Subtract 44 from both sides.

x=3-4x=3−4

2 Simplify  3-43−4  to  -1−1.

x=-1x=−1

Answer:  x > -9     and x [tex]\leq[/tex] -1

Step-by-step explanation:

-5 < x + 4[tex]\leq[/tex] 3   To solve the inequality, subtract 4 from both sides or u can divide the whole thing into two inequalities like, -5 < x + 4    and x + 4 [tex]\leq[/tex] 3  and solve for each other.

-5 < x + 4 [tex]\leq[/tex] 3

-4         -4    -4

-9 < x [tex]\leq[/tex] -1        

or  

-5 < x + 4                     x +4 [tex]\leq[/tex] 3

-4          -4                          -4    -4

 -9 < x                              x ≤ -1

ana can swim at a rate of 3/8 mile in 1/3 hour.

Answers

1/9 hope dis help uuu

-3,0 and 2 are the zeroes of the polynomial p(X)=x³+(a-1)x²+bx+c ,find a,c.​

Answers

Answer:

a = 2

b = - 6

c = 0

Step-by-step explanation:

Since, -3,0 and 2 are the zeroes of the polynomial

[tex] Plug \:x = 0\: in \:p(X) \\

\implies p(0)= 0\\

\therefore 0= 0^3 +(a-1)(0)^2 +b(0)+c\\

\therefore 0= 0 +(a-1)\times 0 +b(0)+c\\

\therefore 0= 0 +0+0+c\\

\red{\bold{\therefore 0=c}}.....(1)\\\\

p(X)=x³+(a-1)x²+bx+c. \\

Plug \:x = -3\: in \:p(X) \\

[tex] \implies p(-3)= 0\\

\therefore 0= (-3)^3 +(a-1)(-3)^2 +b(-3)+c\\

\therefore 0= -27 +(a-1)\times 9 +b(-3)+c\\

\therefore 0= - 27 +9a-9 - 3b+c\\

\therefore 0= - 36+9a-3b+c\\

\therefore 36 =9a-3b+c... (2)\\

Plug \:c= 0\: in \:equation \: (2)\\

36= 9a - 3b + 0\\

36= 9a - 3b\\

36= 3(3a - b) \\

\purple {\bold{12 = 3a - b}} .... (3)\\\\

Plug \:x = 2\: in \:p(X) \\

\implies p(2)= 0\\

\therefore 0= 2^3 +(a-1)(2)^2 +b(2)+c\\

\therefore 0= 8 +(a-1)\times 4 +b(2)+c\\

\therefore 0= 8 +4a-4+2b+c\\

\therefore 0= 4 +4a+2b+c\\

\therefore - 4=4a+2b+c.....(4)\\

Plug \:c= 0\: in \:equation \: (4)\\

- 4 = 4a +2b+0\\

-4= 2(2a+b)\\

\orange{\bold{-2=2a + b}} .......(5)\\\\[/tex]

Adding equation (3) and (5), we find:

12 = 3a - b

-2 = 2a + b

_________

10 = 5a

10/5 = a

a = 2

Plug a = 2 in equation (5)

-2= 2(2) + b

-2 = 4 + b

-2 - 4 = b

-6 = b

b = - 6

Niles and Bob sailed at the same time for the same length of time. Niles' sailboat traveled 27 miles at a speed of 9 mph, while Bob's
motorboat traveled 36 miles at a speed of 12 mph. For how long were Niles and Bob traveling?
OA
2 hours
ОВ.
6 hours
OC.
5 hours
OD. 3 hour please help me with this

Answers

Answer:

D- 3 hours long they were traveling

Step-by-step explanation:

27÷ 9= 3

36÷ 12= 3

A particular satellite is 10 ft wide. A
model of it was built with a scale of 1 in :
2 ft. How wide is the model?

Answers

3 ft

Step-by-step explanation:

I rlly need this quick please and thank you

Answers

Step-by-step explanation:

2002 can be rounded to a compatible number such as 2000.

2000 / 2 = 1000.

They each received around 1000 marbles.

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