The fourth term of an arithmetic series is 3k, where k is a constant, and the sum

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The fourth term of an arithmetic series is 3k, where k is a constant, and the sum of the first six terms of the series is 7k + 9.

a. Show that the first term of the series is 9 – 8k.

b. Find an expression for the common difference of the series in terms of k. Given that the seventh term of the series is 12, calculate:

c. The value of k

d. The sum of the first 20 terms of the series.

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Pearson Edexcel A Level Mathematics Pure Mathematics Year 2

ISBN: 9781292183404

1st Edition

Authors: Greg Attwood, Jack Barraclough, Ian Bettison, David Goldberg, Alistair Macpherson, Joe Petran

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Question Posted: Aug 08, 2023 07:58 AM

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The fourth term of an arithmetic series is 3k, where k is a constant, and the sum

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Lets solve this step by step a To find the first term of the arithmetic series we need to identify t...View the full answer

Pearson Edexcel A Level Mathematics Pure Mathematics Year 2

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