The usual formula for the sum of the first terms of a geometric progression is not…

MATHEMATICS · Single correct · CBSE · Mathematics · Sequences and Series · Sequences and Series

Problem

The usual formula for the sum of the first nn terms of a geometric progression is not valid for which value of the common ratio rr? (a) r=0r=0 (b) r=2r=2 (c) r=1r=1 (d) r=−1r=-1

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