Question

Use f(x) = 1/2x and f -1(x) = 2x to solve the problems.

Answer 1

$f(2) = \frac{1}{2} \times 2 = 1\\f^{-1}(1) = 2 \times 1 = 2\\f^{-1}(f(2)) = f^{-1}(1) = 2$

Note: $f^{-1}(f(x)) = x$ because f -1 and f cancel each other out.