7. (2) Prove by induction the standard formula for the sum of the first n +1 terms of a geometric series with ratio r+ 1: Σ 2ark N r -1 k=0 a(r"+1–1). %D %3B

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
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This is a discrete Math question. Please solve the problem contained in the image. Please show all work.

7. (2) Prove by induction the standard formula for
the sum of the first n +1 terms of a geometric
series with ratio r+ 1:
Σ
2ark
N r -1
k=0
a(r"+1–1).
%D
%3B
Transcribed Image Text:7. (2) Prove by induction the standard formula for the sum of the first n +1 terms of a geometric series with ratio r+ 1: Σ 2ark N r -1 k=0 a(r"+1–1). %D %3B
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