CAPE Pure Mathematics Unit 2 · May/June 2016 · Paper 1 · Question Q17

For -1 < 2n < 1, \sum_{r=0}^{\infty} (2n)^r =

1. (A)\frac{2}{1 - n}
2. (B)\frac{1}{1 - 2n}
3. (C)\frac{2n}{1 + 2n}
4. (D)\frac{2n}{1 - 2n}