(a)[4]
Draw the graph of $y = 2^x$ on the grid below for $0 \le x \le 4$.
(b(i))[2]
By drawing a tangent, estimate the gradient at $x = 0.5$ for the curve.
(b(ii))[1]
Use the graph to estimate the solution of the equation $\frac{1}{2x^2} + 3x = 2$.
(b(iii))[4]
By drawing a suitable line on the grid, estimate the solutions of the equation $\frac{1}{2x^2} = 7 - 4x$.