Which of the following infinite geometric series is convergent?

MATHEMATICS · Single correct · AP · Calculus BC · Infinite Sequences and Series · Infinite Sequences and Series

Problem

Which of the following infinite geometric series is convergent? (a)

0.5+1+2+4+\dots

(b)

4+2+1+\tfrac12+\dots

(c)

5-5+5-5+\dots

(d)

3+3+3+3+\dots