In a geometric progression with positive terms

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

Problem

In a geometric progression with positive terms, the sum of the first two terms is

15

and the sum of the first four terms is

255

. What is the common ratio

r

? (a)

3

(b)

4

(c)

\sqrt{17}

(d)

5