Question

how to find the sum of any arithmetic sequence

Answer 1

HEYA!!!

Here is your answer :
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We can find sum of any arithmetic progression by "n" of terms formula.


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

Here,
n = nth term

a = first term

2nd n = number of terms

d = common difference.


HOPE THIS HELPS U. . . .

Answer 2

there is a formula

Sn = n/2{2a+(n-1)d}