Question

Which of these is not a geometric sequence? 3, 6, 12, 24, ... 250, 50, 10, 2, .... 5, 15, 45, 135, ... 4, 12, 20, 28, ...

Answer 1

250, 50, 10, 2 is not a geometric sequence

Explanation:

It's the only one that doesnt make sence.

Answer 2

4, 12, 20, 28

Explanation:

The 1st one has the pattern of 2x

3 * 2 = 6

6 * 2 = 12

12 * 2 = 24

Everything in this sequence is true

The 2nd one has the pattern of divided by 5

250/5 = 50

50/5 = 10

10/5 = 2

The 2nd one is true

The 3rd one has the pattern of 3x

5 * 3 = 15

15 * 3 = 45

45 * 3 = 135

The 3rd one is true

The 4th one however, I don't seem to see a pattern

4 * 3 = 12

But...

12 * 3 ≠ 20

20 * 3 ≠ 28

Which makes it false

Hope this helps!!!