The sum of the first three terms of an arithmetic series is 12. If the 20th term

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The sum of the first three terms of an arithmetic series is 12. If the 20th term is −32, find the first term and the common difference.

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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 sum of the first three terms of an arithmetic series is 12. If the 20th term is 32, find the first term and the common difference.
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The sum of the first three terms of an arithmetic series is 12. If the 20th term

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Lets denote the first term of the arithmetic series as a and the common difference as ...View the full answer

Pearson Edexcel A Level Mathematics Pure Mathematics Year 2

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