Find the common ratio for the sequence 2, - 4/5, 8/25, - 16/125, 32/625, etc . (5 points)

Question

A) 2/5
B) 4/5
C) - 2/5
D) The sequence is not geometric, therefore there is no common ratio.

Answer 1

well, shucks. If there's a common ratio, just take any two consecutive terms.
r = (-4/5)/2 = -2/5
Yep, that works all the way across.