Advanced Engineering Mathematics
10th Edition
ISBN: 9780470458365
Author: Erwin Kreyszig
Publisher: Wiley, John & Sons, Incorporated
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Prove for r ≠ 1 that ∑_(k=0)^(n-1)(rk)=(1-rn)/(1-r).
If ∑_(k=0)^(n-1)(rk), then compute s(1−r) = s−rs, and solve for s.
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