Find the equation of the tangent at the point where the curve intersects the $x$-axis.
(ii)[2]
A point moves along the curve so that the $x$-coordinate is increasing steadily at $0.04$ units per second. Determine the rate of change of the $y$-coordinate when $x = 4$.
Worked solution & mark scheme
This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Locates the $x$-axis intersection at $x=6$.” …