Question

Sum of infinite terms of arithmetic progression formula

Answer 1

The sum of an infinite arithmetic sequence is either ∞ , if d > 0 , or - ∞ , if d < 0 . Sum of ap= n/2[2a + (n-1)d] where a=first term of the ap, n=no. of terms and d=common differnce. .

Answer 2

Hey!!!!!

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Let the infinite terms be n

Then Sn⤵️

=>

$\frac{n}{2} (2a + (n - 1)d)$

and if the last term is available then the last term be l
then the formula will be =>

$\frac{n}{2} (a + l)$

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Hope this helps ✌️