Mathematics 4024 · O Level · Functions

Functions — practice question

Take $f(x) = x^2 - 7$ and $g(x) = \frac{4 - 3x}{2}$.

(a)[1]

Find the value of $f(8)$.

(b)[1]

Find the value of $g(-2)$.

(c)[3]

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

(d)[4]

Solve the equation $f(2x - 1) + 3 = 0$.

Worked solution & mark scheme

This 9-mark question has a full step-by-step worked solution and mark scheme. One marking point: “57.” …