The diagram illustrates a section of the curve $y = -x^2 + 8x - 10$ that goes through the points $A$ and $B$. The curve reaches a maximum at $A$, and the gradient of line $BA$ is $2$.
(i)[7]
Find the coordinates for $A$ and $B$.
(ii)[4]
Find $\int y \, dx$ and hence determine the area of the shaded region.
Worked solution & mark scheme
This 11-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Differentiates to obtain $\frac{dy}{dx}=-2x+8$” …