(i)[3]
Express $9x^2 - 6x + 6$ in the form $(ax + b)^2 + c$, where $a$, $b$ and $c$ are constants.
(ii)[1]
The function $f$ is defined by $f(x) = 9x^2 - 6x + 6$ for $x \geq p$, where $p$ is a constant. State the least value of $p$ that makes $f$ a one-one function.
(iii)[4]
For this value of $p$, obtain an expression for $f^{-1}(x)$, and state the domain of $f^{-1}$.
(iv)[1]
State the set of $q$ values for which the equation $f(x) = q$ has no solution.