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Root-mean-square

Revision as of 18:01, 15 July 2007 by Archimedes1 (talk | contribs)
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The root-mean square, or quadratic mean, of any positive real numbers $x_1,\dots , x_n$, is

$\sqrt{\frac{x^2_1+x^2_2+\dots+x^2_n}{n}}$

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