Which sequences are geometric? select three options.
–2.7, –9, –30, –100,
–1, 2.5, –6.25, 15.625,
9.1, 9.2, 9.3, 9.4,
8, 0.8, 0.08, 0.008,
4, –4, –12, –20, …

–2.7, –9, –30, –100, ...

9.1, 9.2, 9.3, 9.4, ...

8, 0.8, 0.08, 0.008, ...

Step-by-step explanation:

To find the geometric series , we divide the second term by first term and find common ratio

–2.7, –9, –30, –100, ...

Common ratio is 3.3

–1, 2.5, –6.25, 15.625, ...

There is no common ratio

9.1, 9.2, 9.3, 9.4, ...

common ratio is 1.01

8, 0.8, 0.08, 0.008, ...

common ratio is 0.1

4, –4, –12, –20, …

There is no common ratio

step-by-step explanation: