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3.3 Sequences and series (A-level only)

3.3 Sequences and series (A-level only)

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Question 117
a.

Expand (3+2x)12\displaystyle (3 + 2x)^{\frac{1}{2}}(3+2x)21​ in ascending powers of x x\,x up to and including the term in x3x^3x3.

[4]
b.

Write down the range of values of x x\,x for which the expansion is valid.

[1]
c.

Use your expansion, with x=0.1x = 0.1x=0.1, to find an approximation for 3.2\sqrt{3.2}3.2​. Give your answer to three decimal places.

[1]
Markscheme

3.3 Sequences and series (A-level only) Questions

  1. A Level
  2. /Maths
  3. /3.3 Sequences and series (A-level only)

200 exam-style questions on CCEA A Level Maths 3.3 Sequences and series (A-level only), covering 3.3.1 Sequences and series (A-level only), 3.3.2 Sequences and series (A-level only), 3.3.3 Sequences and series (A-level only), 3.3.4 Sequences and series (A-level only), 3.3.5 Sequences and series (A-level only), 3.3.6 Sequences and series (A-level only), 3.3.7 Sequences and series (A-level only), and 3.3.8 Sequences and series (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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