Mathematics 0580 · IGCSE · Functions

Functions — practice question

The functions are given by $f(x) = 3 + 4x \quad g(x) = 6x + 7$.
(a)[1]

Find the simplest form of $f(3x)$.

(b)[2]

Find the simplest form of $fg(x)$.

Worked solution & mark scheme

This 3-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Final answer: $3+12x$.” …

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