Mathematics 0580 · IGCSE · Functions

Functions — practice question

The functions are given by $f(x) = 7 + 3x$, $g(x) = x^4$ and $h(x) = 3^x$.

(a)[2]

Given $h(3x) = k$, find k.

(b)[2]

For $f(x) = g(2)$, find the value of x.

(c)[2]

Find the inverse function $f^{-1}(x)$.

Worked solution & mark scheme

This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “The value is $27$.” …