CAPE Pure Mathematics Unit 1 · May/June 2011 · Paper 1 · Question Q9

The exact value of \left(\frac{25}{16}\right)^{-\frac{1}{2}} is

1. (A)\frac{2}{5}
2. (B)\frac{4}{5}
3. (C)\frac{5}{4}
4. (D)\frac{5}{2}