Edexcel A-level Mathematics · 9MA0

Iteration & Newton–Raphson

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Extreme practice · Multi-step problems within A-level pure maths. Difficulty is an editorial judgement. These questions are self-reviewed, not ranked.

Edexcel format & instructions

Calculator permitted. Show sufficient working in the spaces provided. Give inexact answers to 3 significant figures unless specified otherwise. The official exam provides a formulae and statistical tables booklet.

Original topic practice. This set is not a full official paper. Written work is self-reviewed against our worked solutions.

01 · Pure 1 · 100 marks · 2 hours
02 · Pure 2 · 100 marks · 2 hours
03 · Statistics & mechanics · 100 marks · 2 hours

Official specification ↗ · Official past papers ↗

QUESTION PAPER

Mathematics · A levelPure Mathematics practice · 9MA0

Torus Maths original · Edexcel style

The curve $y=x\mathrm e^{-3x}$ is intersected by $y=1/(6\mathrm e)$ .

(a)

Show that there are exactly two intersections with x>0.

(4)

Working

(b)

Put $t=3x$ . Obtain a Newton–Raphson formula for the larger root and use $t_0=3$ to calculate $t_1,t_2,t_3$ . Give the corresponding approximation to x to 3 decimal places.

(5)

Working

(Total for Question 1 is 9 marks)

Question reference: edexcel-a-level-extreme-14-01Report a question →

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