SOLUTION: find the sum of the first eight terms in the series -4+8-16+�

SOLUTION: find the sum of the first eight terms in the series -4+8-16+�

Algebra.Com

Question 860678: find the sum of the first eight terms in the series -4+8-16+�
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
S=t*(1 - r^n)/(1 - r)
r=-2
S=-4*(1 - (-2)^8)/(1 - (-2))
S = 340

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