Mathematics 9709 · AS & A Level · Numerical solution of equations

Numerical solution of equations — practice question

The curve is defined by $e^{2x}y - e^{y} = 100$.
(a)[3]

Show that $\frac{dy}{dx} = \frac{2e^{2x}y}{e^{y} - e^{2x}}$.

(b)[2]

Show that the curve has no stationary points.

(c)[4]

Show that the $x$-coordinate of $P$ satisfies the equation $x = \ln 10 - \tfrac{1}{2}\ln(2x - 1)$.

(d)[3]

Apply an iterative formula, based on the equation in part (c), to determine the $x$-coordinate of $P$ correct to $3$ significant figures. Begin with $2$ and record each iteration to $5$ significant figures.

Worked solution & mark scheme

This 12-mark question has a full step-by-step worked solution and mark scheme. One marking point: Differentiate $e^{2x}y$ with the product rule

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