Question

Which sequences are geometric? Check all that apply.

O 1,5, 25, 125, ...
3, 6, 9, 12,...
3, 6, 12, 24, ...
3, 9, 81, 6, 561, ...
10, 20, 40, 60, ...

Answer 1

1, 5, 25, 125, ...

3, 6, 12, 24, ...

Explanation:

• a geometric progression is a sequence of numbers where each term after the first is found by multiplying the previous one by a fixed, non-zero number called the common ratio

1, 5, 25, 125, ...

• yes, the common ratio is 5

3, 6, 9, 12,...

• no

3, 6, 12, 24, ...

• yes, the common ratio is 2

3, 9, 81, 6, 561, ...

• no

10, 20, 40, 60, ...

• no