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Sequences and Series

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Question 90

The fifth term of a geometric series is 12 and the eighth term of the series is 96.

Find the common ratio and the first term of the series and hence find the sum of the first 20 terms, giving your answer to the nearest whole number.

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Markscheme

Sequences and Series Questions

  1. A Level
  2. /Maths
  3. /Sequences and Series

326 exam-style questions on Edexcel A Level Maths Sequences and Series, covering 3.1 Arithmetic Sequences, 3.2 Arithmetic Series, 3.3 Geometric Sequences, 3.4 Geometric Series, 3.5 Sum to Infinity, 3.6 Sigma Notation, 3.7 Recurrence Relations, and 3.8 Modelling with Series. Each one has a worked solution and a mark scheme showing where the marks go.

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