If , then the value of , is…

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

Problem

(1.5)^{30} = k

, then the value of

\sum_{n=2}^{29} (1.5)^n

, is : (a)

2k - 3

(b)

k + 1

(c)

2k + 7

(d)

2k - \frac{9}{2}