Question

Find the common ratio of the geometric sequence: -15, 135, -1215

Answer 1

A=7

Explanation:

a1=-19

a2=-26

a3=-33

Find the common difference ("d")

d=a2-a1

d=(-26)-(-19)

d=-7

Answer 2

Answer: (−15)(135)−1215

=−2025−1215

=−3240

Explanation: