MATHEMATICS · Single correct · CBSE · Mathematics · Sequences and Series · Sequences and Series
Problem
In an infinite G.P., the sum of first three terms is 70. If the extreme terms are multiplied by 4 and the middle term is multiplied by 5, the resulting terms form an A.P. then the sum to infinite terms of G.P. is:
(a) 120
(b) 40
(c) 160
(d) 80