In an arithmetic progression the sum of the 1st term and the 5th term is 18. The

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In an arithmetic progression the sum of the 1st term and the 5th term is 18. The 5th term is 6 more than the 3rd term. Find the sum of the first 12 terms.

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Complete Pure Mathematics 1 For Cambridge International AS & A Level

ISBN: 9780198427438

2nd Edition

Authors: Jean Linsky, Brian Western, James Nicholson

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Question Posted: Apr 14, 2023 10:30 AM

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In an arithmetic progression the sum of the 1st term and the 5th term is 18. The

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Let the first term of the arithmetic progression be a and the common difference be d The f...View the full answer

Complete Pure Mathematics 1 For Cambridge International AS & A Level

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