Question

What is Formula for Sum of Terms in A.P. upto n'th term​

Answer 1

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Formula for Sum of terms in A.P upto n th term.

S n = n/2 × (2a+(n-1)d)

Or

S n = n/2 × (a + a"n)

Answer 2

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Sum of terms of any AP upto n terms

$= \frac{n}{2} (2a + (n - 1)d) \\ or \\ = \: \frac{n}{2} (a + l)$

a = 1st term, d = common difference

l = last term

Hope it helps...

Mark Brainliest!

THNKS!!