SOLUTION: S=n/2(2a(n-1)d)

Question 1181103: S=n/2(2a(n-1)d)
Found 2 solutions by mananth, ikleyn:
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
what is the question?
Answer by ikleyn(52776) (Show Source): You can put this solution on YOUR website!
.

If it is supposed to be the formula for the sum of the first n terms of an arithmetic progression,

then this formula is written INCORRECTLY in this post.

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