Question

Which of the following are geometric sequences?

Check all that apply.

A. -9, -3, -1, -1/3, -1/9, -1/27
B. 5, 10, 15, 20, 25
C. 1, 1, 2, 3, 5, 8, 13
D. 10, 5, 2.5, 1.25, 0.625, 0.3125

Answer 1

A, D

Answer 2

A: r = 1/3,
D: r=1/2
B is an AS and C is the fibonacci sequence

Answer 3

A.) -9, -3, -1, -1/3, -1/9, -1/27

D.) 10, 5, 2.5, 1.25, 0.625, 0.3125