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IMO 1972

Posted: Tue Dec 04, 2018 11:12 am
by Arifa
Prove that, (2n)!(2m)!/n!m!(n+m)! is an integer. Where m, n is positive integer[*]

Re: IMO 1972

Posted: Thu Jan 10, 2019 12:29 am
by samiul_samin
Arifa wrote:
Tue Dec 04, 2018 11:12 am
Prove that, (2n)!(2m)!/n!m!(n+m)! is an integer. Where m, n is positive integer[*]
Full solution