Mathematics 0580 · IGCSE · Functions

Functions — practice question

The functions are $f(x)=7-x$, $g(x)=4x+2$, and $h(x)=15-x^{2}$.

(a)[2]

Find the value of $f\!f(2)$.

(b)[2]

Find $g f(x)$, written in its simplest form.

(c)[2]

Find $h(2x)$, written in its simplest form.

Worked solution & mark scheme

This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “The answer is $2$.” …