Question

find the 12th term of 1/2, 3/4, 9/8, ...

Answer 1

Common ratio or r : 3/2
n=12 [Because we are finding the 12th term.
First term or a = 1/2

nth term = ar^(n-1)

Substitutethe values given in the expression and get the 12th term.

Understood. :)

Answer 2

r=3/2 okay?

Answer 3

43.25 ?

Answer 4

how did you get the common ratio r as 3/2

Answer 5

that was my problem

Answer 6

You can find the common ratio by dividing the 2nd term to the 1st term.
For example, divide 3/4 by 1/2
This will be 3/4 * 2
Therefore, r = 3/2

Answer 7

Is always in all cases?

Answer 8

Yes. :)