SOLUTION: if s=1/2n(2a+(n-1)d) then what d=?

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Question 1120037: if s=1/2n(2a+(n-1)d) then what d=?

Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
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s=1/2n(2a+(n-1)d) .... what d=?
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What is that?

s=%281%2F2%29n%282a%2B%28n-1%29d%29?

s=%281%2F%282n%29%29%282a%2B%28n-1%29d%29?

s=1%2F%282n%282a%2B%28n-1%29d%29%29?