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3.8 Numerical Methods (A-level only)

3.8 Numerical Methods (A-level only)

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Question 70

The curve $C\,$ has the equation

$x)\ln x$ , $x > 0$

a.

Find $dydx\displaystyle \frac{dy}{dx}$ .

$C\,$ has a stationary point at $P$ .

[2]

b.

Show that the $x$ -coordinate of $P\,$ lies between 4.5 and 5.

[2]

c.

Show that the $x$ -coordinate of $P\,$ is a solution of $\dfrac{12}{1 + \ln x}$ .

[2]

d.

Use the iteration formula

$xn+1=121+ln⁡xn\displaystyle x_{n+1} = \frac{12}{1 + \ln x_n}$

with $x_0 = 4.75$ to find, to three decimal places, the values of $x_1$ , $x_2\,$ and $x_3$ .

[2]

Markscheme

3.8 Numerical Methods (A-level only) Questions

A Level
Maths
3.8 Numerical Methods (A-level only)

129 exam-style questions on WJEC A Level Maths 3.8 Numerical Methods (A-level only), covering 3.8.1 Numerical Methods (A-level only), 3.8.2 Numerical Methods (A-level only), 3.8.3 Numerical Methods (A-level only), 3.8.4 Numerical Methods (A-level only), and 3.8.5 Numerical Methods (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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