Question

Find the common ratio of the geometric sequence: 2/3,−2, 6,…

A. −1/3

B. -3

C. -1

D. 3

Answer 1

B

Explanation:

The geometric ratio is a3/a2=a2/a1=-2/(2/3)=-3.

Answer 2

B. -3

Explanation:

Find the common ratio by dividing a term in the sequence by the one before it:

6/-2

= -3

So, the common ratio is -3.

The correct answer is B. -3