how do we find sum of an arithmetic progression?

Question : how do we find sum of an arithmetic progression? Solution : n terms of an arithmetic progression is a sequence of the form a, a+d, a+2d, a+3d, a+4d,…….a+(n-1)d It’s sum is \[S_n = a+a+d+a+2d+a+3d+ a+4d+……+a+(n-1)d \] \[S_n =…

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