The sum to infinity of an infinite geometric series is
MATHEMATICS · Single correct · A Level · Mathematics · Sequences and series · Sequences and series
Problem
The sum to infinity of an infinite geometric series is 9. If the second term of the series is −1.2, determine the common ratio r (correct to two decimal places) for which the series converges.
(a) 0.12
(b) −0.12
(c) 0.84
(d) 0.16