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3.4 Sequences and Series (A-level only)

3.4 Sequences and Series (A-level only)

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Question 28

The expression (1+3x)−2(1 + 3x)^{-2}(1+3x)−2 is expanded as a binomial series in ascending powers of xxx.

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

Tick one box.

A

∣x∣<13|x| < \frac{1}{3}∣x∣<31​

B

∣x∣<12|x| < \frac{1}{2}∣x∣<21​

C

∣x∣<2|x| < 2∣x∣<2

D

∣x∣<3|x| < 3∣x∣<3

Markscheme

3.4 Sequences and Series (A-level only) Questions

  1. A Level
  2. /Maths
  3. /3.4 Sequences and Series (A-level only)

231 exam-style questions on WJEC A Level Maths 3.4 Sequences and Series (A-level only), covering 3.4.1 Sequences and Series (A-level only), 3.4.2 Sequences and Series (A-level only), 3.4.3 Sequences and Series (A-level only), 3.4.4 Sequences and Series (A-level only), 3.4.5 Sequences and Series (A-level only), 3.4.6 Sequences and Series (A-level only), and 3.4.7 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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