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

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

Answer by ikleyn(52776) About Me  (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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