Asked by Anonymous
Find the sum of the series
-4 + 1 -1/4 + 1/16 - 1/64 + 1/256 + ... .
-4 + 1 -1/4 + 1/16 - 1/64 + 1/256 + ... .
Answers
Answered by
Reiny
A GS, with
a = -4
r = -1/4
sum(∞) = a/(1-r)
= -4/(1 -(-1/4) )
= -4/(5/4)
= -16/5 or -3.2
a = -4
r = -1/4
sum(∞) = a/(1-r)
= -4/(1 -(-1/4) )
= -4/(5/4)
= -16/5 or -3.2
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