Mathematics 9709 · AS & A Level · Differentiation

Differentiation — practice question

The parametric equations for the curve are $x = \ln(t + 1)$ and $y = e^{2t} + 2t$.
(i)[4]

Find an expression, in terms of $t$, for $\frac{dy}{dx}$.

(ii)[4]

Find the equation of the normal to the curve at the point for which $t = 0$. Give your answer in the form $ax + by + c = 0$, where $a$, $b$ and $c$ are integers.

Worked solution & mark scheme

This 8-mark question has a full step-by-step worked solution and mark scheme. One marking point: State that $\frac{dx}{dt} = \frac{1}{t+1}$

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