Question

Find the first six terms of the sequence.

a1 = -8, an = 5 • an-1

Answer 1

-8, -40, -200, -1000, -5000, -25,000 is what i'm thinking

Answer 2

@jdoe

Answer 3

@SolomonZelman

Answer 4

You got the common ratio and the first term.

Answer 5

YES

Answer 6

The terms are all correct.

Answer 7

You need just the terms, or maybe also their sum ?

Answer 8

just the first 6 terms.

Answer 9

Okay

Answer 10

do you think you could help me with other problems on this thread?

Answer 11

Yes, sure.

Answer 12

You are either very good at getting used to new websites such as openstudy, or you had a different account before. (I would think the first one )

Answer 13

i am new.

Answer 14

Find an equation for the nth term of the arithmetic sequence.

a10 = 32, a12 = 106

Answer 15

At first you need to find the difference. But by equation do you mean to find the \(\large\color{blue}{ a_n=a_1+d(n-1) }\) or \(\large\color{blue}{ a_n=a_{n-1}+d }\) ?

Answer 16

\(\large\color{blue}{ a_{12}=a_{10}+2d }\)

Answer 17

the last one is to find the difference.

Answer 18

the 1st one you wrote

Answer 19

Okay, from \(\large\color{blue}{ a_{12}=a_{10}+2d }\) can you find the difference?

Answer 20

d=37

Answer 21

is that right?

Answer 22

(106-32)÷2=37... correct.

Answer 23

Then, for \(\large\color{blue}{ a_n=a_1+d(n-1) }\)

Answer 24

You need to find a1, can you do that?

Answer 25

no, could you help me?

Answer 26

\(\large\color{blue}{ a_{12}=a_1+37(12-1) }\)

Answer 27

a12=-301

Answer 28

how am i suppose to know its a12 or a10?

Answer 29

oh, i get it.