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1.12 I: Numerical methods (A-level only)

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Question 37

k(x)=2ln⁡(x+1)+x2−8x>−1k(x) = 2\ln(x + 1) + x^2 - 8 \quad x > -1k(x)=2ln(x+1)+x2−8x>−1

a.

Show that k(x)=0k(x) = 0k(x)=0 has a root in the interval [2.3,2.4][2.3, 2.4][2.3,2.4]

[2]
b.

Find k′(x)k'(x)k′(x)

[3]
c.

Using x0=2.3x_0 = 2.3x0​=2.3 as a first approximation, apply the Newton-Raphson procedure to find a second approximation, giving your answer to 3 decimal places.

[3]

1.12 I: Numerical methods (A-level only) Questions

  1. A Level
  2. /Maths
  3. /1.12 I: Numerical methods (A-level only)

Practise AQA A Level Maths 1.12 I: Numerical methods (A-level only) with exam-style questions for A Level Maths. 107 questions covering 1.12.1 Locating roots by change of sign (A-level only), 1.12.2 Iterative methods and Newton-Raphson (A-level only), 1.12.3 Numerical integration (A-level only), and 1.12.4 Numerical methods in context (A-level only), matched to the AQA A Level Maths (7357) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.

Question bank