CAPE Pure Mathematics Unit 1 · May/June 2013 · Paper 1 · Question Q4

Rationalising \frac{\sqrt{2}-1}{\sqrt{2}+1} gives

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