Determine an expression for $\frac{dy}{dx}$ and show that the gradient of the curve at the point $(-1, 2)$ is $-\frac{5}{2}$.
(ii)[3]
Show that the curve has no stationary points.
(iii)[2]
Determine the $x$-coordinate of every point on the curve where the tangent is parallel to the $y$-axis.
Worked solution & mark scheme
This 10-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Obtain $-4y-4x\dfrac{dy}{dx}$ by applying the product rule” …