Math, asked by chcesr, 1 year ago

The sum of 7 terms in an a.p. is 49. And that of 17 terms is 289. Find the sum of n terms.

Answers

Answered by laksh9995

1

Answer:

n2 is the answer of this question

Answered by brainlyaryan12

3

Answer:

n(n+1)divided by 2

Step-by-step explanation:

It is the formula for finding the sum

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