In a geometric progression with first term and common ratio

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

Problem

In a geometric progression with first term

a

and common ratio

r

, the sum of the first

n

terms is equal to

na

. What does this tell you about

r

? (a)

r=-1

(b)

r=1

(c)

r=0

(d)

r=\dfrac{1}{2}