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What is ∑5 n=1 [5(−2)n−1] equal to?

The five is on top of the 'sum' (Greek E) sign & the n=1 is on the bottom of the sign. Then its the equation.

If you could help me answer this question I appreciate it. Thanks.

Guest Apr 16, 2018

+1

yes, thanks so much

Guest Apr 16, 2018

Answer 1

I assume that this might be :

5

Σ [ 5(-2)^n-1 = 55

n = 1