Math, asked by pvarma5360, 10 months ago

The sum of 15 terms of an ap is 495 and 5th term is 21

Answers

Answered by saanvigoel

4

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Step-by-step explanation:

Assume that it's an arithmetic sequence. a+4d = 21 => a = 21–4d. 495 = (2a+14d)(15)/2 = (42+6d)(15)/2 = 315 + 45d.

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