The functions are $f(x) = 1 - 2x$, $g(x) = x + 4$, and $h(x) = x^2 + 1$.
(b)[2]
Find the solution to $2f(x) = g(x)$.
(c)[2]
Work out $fg(x)$. Write your answer in its simplest form.
(e)[2]
Find the inverse function $f^{-1}(x)$.
(f)[4]
Determine the value of $p$ and the value of $q$.
Worked solution & mark scheme
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