Question

Find the common ratio for this geometric sequence.

72, 12, 2, 1/3, 1/18

OA. 6
OB. 3
OC. 1/6
OD. 1/3

Answer 1

OC. 1/6

Explanation:

To find the common ratio, you can use
`a_(n)`/
`a_(n-1)` where
`a_(n)` is the nth term and
`a_(n-1)` is the (n-1)th term.

12/72= 1/6

2/12= 1/6

(1/3)/2= 1/6

(1/18)/(1/3)= 1/6

So the common ratio for the geometric sequence is 1/6.