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Sigma notation

Posted March 2nd, 2010 by alpha
in
  • Algebra questions

How to calculate;
$ \sum_{r=1}^{n}\frac{1}{n} $ or something in the form of1/x.

‹ Sigma notation Prove the sum of the cube of the first n integers(i.e. summation n^3) by mathematical induction ›
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