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2 marksThe Binomial Theorem

CAPE Pure Mathematics Unit 2 · May/June 2024 · Paper 2 · Question 3(c)(iii)

Use the expansion obtained in (c)(i) to estimate the value of (16 – 5x)¹/⁴ when x = 3.

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Other parts of this question

  1. 3(a)Use two iterations of the Newton-Raphson method, with the initial estimate x₀ = 0.3, to calculate a new estimate for the root of f(x) = 3x² - 4x + 1.[6 marks]
  2. 3(b)Determine the Taylor series expansion of f(x) = 1/(1-2x) about x = 3 up to and including the term in x².[9 marks]
  3. 3(c)(i)Obtain the binomial expansion of (16-5x)¹/⁴ up to and including the term in x².[6 marks]
  4. 3(c)(ii)Hence, state the values for which the expansion of (16 – 5x)¹/⁴ is valid.[2 marks]

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