Mathematics 0580 · IGCSE · Functions

Functions — practice question

The rule is $f(x) = 5 - 3x$.

(a)[1]

Find the value of $f(6)$.

(b)[1]

Find $f(x + 2)$.

(c)[2]

Find $f(f(x))$, in simplest form.

(d)[2]

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

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 $-13$.” …