Asked by tom

How do I find the sum of a geometric series from 2 to infinity of -3/ (4^n) ?
Answered by oobleck
a = -3/4
r = 1/4
S(2..āˆž) = Sāˆž - S1
Answered by tom
so s=-13/4?
Answered by tom
no it should be -1/4
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