Mathematics 4024 · O Level · Functions

Functions — practice question

The function is given by $f(x) = \dfrac{2 - 4x}{5}$.
(a)[3]

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

(b)[2]

Simplify the expression $f(x) - f(2x)$.

Worked solution & mark scheme

This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: “This gives $5y=2-4x$.” …

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