(a)[1]
Find the value of f(1).
(b)[1]
Solve the equation f(x) = 3.
(c)[2]
The equation f(x) = k has only one solution for $-2.5 \le x \le 2$. State the set of values of k for which this can happen.
(d)[3]
By drawing an appropriate straight line, solve the equation f(x) = x - 5.
(e)[3]
Draw a tangent to the graph of y = f(x) at the point where x = 1. Use your tangent to estimate the gradient of y = f(x) when x = 1.