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1.7 D: Sequences and series

1.7 D: Sequences and series

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Question 100

The first three terms of an arithmetic series are

(k+3)(k + 3)(k+3), (2k+4)(2k + 4)(2k+4) and (4k−2)(4k - 2)(4k−2)

respectively, where k k\,k is a constant.

a.

Find the value of kkk.

[2]
b.

Find the sum of the first 20 terms of the series.

[3]
Markscheme

1.7 D: Sequences and series Questions

  1. A Level
  2. /Maths
  3. /1.7 D: Sequences and series

308 exam-style questions on AQA A Level Maths 1.7 D: Sequences and series, covering 1.7.1 Binomial expansion, 1.7.2 Types of sequence (A-level only), 1.7.3 Sigma notation (A-level only), 1.7.4 Arithmetic sequences and series (A-level only), 1.7.5 Geometric sequences and series (A-level only), and 1.7.6 Sequences and series in modelling (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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