If the sum of first 7 terms of an AP is 49 and t hat of its first 17 terms is 289 find the sum of first n terms of the AP CBSE Mathematics

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If the sum of first 7 terms of an A.P. is 49 and t hat of its first 17 terms is 289, find the sum of first n terms of the A.P. CBSE Mathematics




By:tarun101

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