Question

Which of the following are geometric sequences?

(check all that apply)

A. 2,-2,2,-2,2,-2,2

B. 1,4,9,16,25,36,49

C. 10,5,2.5,1.25,0.625,0.1325

D. 1,2,4,8,16,32

Answer 1

A. 2,-2,2,-2,2,-2,2
C. 10,5,2.5,1.25,0.625,0.1325
and
D. 1,2,4,8,16,32
Are all geometric sequences

This means that each sequential # is derived by either multiplying or dividing by a number.

For instance, A. is found by multiplying each by - 1, B. is found by multiplying each by 1/2 (0.5), and D. is found by multiplying each by 2