(a)[2]
Work out the value of $f(2)$.
(b)[2]
Work out $gh(x)$, then simplify the result.
(c)[2]
Work out the inverse, $h^{-1}(x)$, of $h(x)$.
Mathematics 0580 · IGCSE · Functions
Functions — practice question
The functions are $f(x) = x^3$, $g(x) = 3x - 5$, and $h(x) = 2x + 1$.