CAPE Pure Mathematics Unit 2 · May/June 2015 · Paper 1 · Question Q22

Let a_n and S_n denote respectively, the value of the n^{\text{th}} term and the n^{\text{th}} partial sum of a series. The value of S_{n+2} - S_n when calculated on the series is

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