Question

PLEASE HELP. Having loads of trouble with finding "r" in this geometric series equation. Attachment below.

Answer 1

@ganeshie8

Answer 2

@AravindG

Answer 3

Do u know how to write general term?

Answer 4

Yes I do.

Answer 5

What's tripping me up are the steps to get "r".

Answer 6

So a5=?

Answer 7

324

Answer 8

No I mean using general term method a5=?

Answer 9

I don't understand...

Answer 10

\[a_n=ar^{n-1}\]

a5=?

Answer 11

Would I set that up as ?

Answer 12

Yep.

Answer 13

I just don't know where I'd go from there. I don't know what "n" stands for. This whole thing is really confusing me.

Answer 14

n=5 here.

Answer 15

n generally mean nth term. Here 5th term is given so n=5

Answer 16

Ohhhhhh yeah! Ok, so