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\left(\prod·_{i=1}^{n}x_{i}\right)^{\frac·
{1}{n}}={\sqrt[{n}]{x_{1}x_{2}\cdots·x_{n}}}¶
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\left(\prod _{i=1}^{n}x_{i}\right)^{\frac {1}{n}}={\sqrt[{n}]{x_{1}x_{2}\cdots x_{n}}}