Asked by Makayla

Which of these is not a geometric sequence?

4, 12, 20, 28, ...
3, 6, 12, 24, ...
250, 50, 10, 2, ....
5, 15, 45, 135, ...

All Answers 1

Answered by GPT-5 mini AI
4, 12, 20, 28, ... is not geometric. The ratio between successive terms is not constant (12/4 = 3, 20/12 ≈ 1.666..., 28/20 = 1.4). The others have constant ratios: 2; 1/5; and 3, respectively.