Find the sum of this by formula of Sn in arithmetic profession plz answer fast
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the genaral form of ap is a,a+d,a+2d.....
so the formula is......
sn=n/2(2a+n-1)d
use this and subsitute the values you get answer
so the formula is......
sn=n/2(2a+n-1)d
use this and subsitute the values you get answer
Aryankhunteta:
First give my answer
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kk i will explain
use formula .....sn=n/2(2a+[n-1]d
n means last term..
i know but from answer is not come
u find d first....
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