Find the common ratio of the geometric sequence -1, -9, -81,...−1,−9,−81,

Geometric

Common ratio = 3

Step-by-step explanation:

3,9,27,81 is geometric because there is a common ratio.

We know there is a common ratio because a term divided by it's previous term is the same each time.

That is

81/27=3

27/9=3

9/3=3.

So the common ratio is 3.

the correct answer to your question is a. 4^4

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step-by-step explanation:

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