Question

If the sum of first 7 terms of an AP is 49 and that of 17 terms is 289, find the sum of first n terms.​

Answer 1

Answer:

Sum of first n terms will be n²

Step-by-step explanation:

Sum of first 7 terms = 49 = 7²

Sum of first 17 terms = 289 = 17²

So sum of first n terms will be n²

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