Mathematics 9709 · AS & A Level · Differentiation

Differentiation — practice question

The gradient of a curve is given by $\frac{dy}{dx} = 6(3x - 5)^3 - kx^2$, where $k$ is a constant. The curve passes through a stationary point at $(2, -3.5)$.
(a)[2]

Find the value for $k$.

(b)[4]

Find the curve's equation.

(c)[2]

Find the expression for $\frac{d^2y}{dx^2}$.

(d)[2]

Determine the type of stationary point at $(2, -3.5)$.

Worked solution & mark scheme

This 10-mark question has a full step-by-step worked solution and mark scheme. One marking point: Making $\frac{dy}{dx}=0$ at $x=2$

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