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 1st n terms is n^2

Alternative:-

Sum of 1st 7 terms=49........(7)^2

Sum of 1st 17 terms=289.......(17)^2

So sum of 1st n terms is n^2

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Answer 2

Answer:

Aaj aapka birthday hai

Wish you many many happy returns of the day ❤❤