Question

How is defined Gamma function?

Answer

Gamma function is defined as
$\sqrt{n}={ʃ}_0^{\alpha }{x}^{\mathrm{n-1}}{e}^{\mathrm{-x}}\mathrm{dx}$
$\mathrm{where\; n\; is\; a\; positive\; integer.}$
$\sqrt{n}=\left(\mathrm{n-1}\right)!$

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