Algebra-1

To find the explicit formula for the geometric sequence , follow these steps:

1.Identify the first term :

Here, .

 

2.Determine the common ratio r:

Divide the second term by the first term: .

Divide the third term by the second term: .

The common ratio r = -1.

 

3.Write the general formula for a geometric sequence:

The explicit formula for a geometric sequence is 

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