Math, asked by sathya9119, 2 months ago

find the sum of first 20 terms in rhis arithmetic sequence. 5,11,17....using 1/2an(n+1) +bn.

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Answered by samarsharma1110

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find the sum of first 20 terms in rhis arithmetic sequence. 5,11,17....using 1/2an(n+1) +b

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