(a)[2]
Write $x^2 + 4x + 2$ in the form $(x + a)^2 + b$, where $a$ and $b$ are integers.
(b(i))[3]
Find an expression for $f^{-1}(x)$.
(b(ii))[4]
Find an expression for $(gf)^{-1}(x)$.
Mathematics 9709 · AS & A Level · Functions
Mathematics 9709 · AS & A Level · Functions
Write $x^2 + 4x + 2$ in the form $(x + a)^2 + b$, where $a$ and $b$ are integers.
Find an expression for $f^{-1}(x)$.
Find an expression for $(gf)^{-1}(x)$.