Which of the following are geometric series?
1
1 1 1 1 1
2 4 8 16 32
2 +5 + 8 + 11 + 14 + 17
1+1+2+3+5+ 8 +13 +21
-256 +64 - 16 + 4 - 1

-256 +64 - 16 + 4 - 1

Step-by-step explanation:

A series is the summation of all the terms in a sequence.

So it is only the last three options that qualify to be a series.

The series 2 +5 + 8 + 11 + 14 + 17 has no common ratio. It is not geometric.

The series 1+1+2+3+5+ 8 +13 +21 also has no common ratio. It is not geometric.

The series -256 +64 - 16 + 4 - 1 has a common ratio of

There the only series that is geometric is.

-256 +64 - 16 + 4 - 1

so then what are you asking?

step-by-step explanation:

yes

step-by-step explanation:

yes