The sum to infinity of an infinite geometric progression is and its common ratio is

MATHEMATICS · Single correct · A Level · Mathematics · Sequences and series · Sequences and series

Problem

The sum to infinity of an infinite geometric progression is

12

and its common ratio is

\dfrac{1}{3}

. Find the first term

a

. (a)

6

(b)

8

(c)

4

(d)

9