Please help me to solve the above proof. It is related to beta and gamma function .
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1I voted to close this question as it does not produce any argument as to why the OP is stuck. – Xi'an ні війні Mar 25 '17 at 11:14
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Hint. One may try $$ x=\sin^2 \theta,\qquad dx=2 \cos \theta \sin \theta \:d\theta. $$
Olivier Oloa
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