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1972 IMO Problems/Problem 3

Revision as of 12:00, 20 October 2013 by Elvis (talk | contribs) (Created page with "Let m and n be arbitrary non-negative integers. Prove that ((2m)!(2n)!)/mn!(m+n)! is an integer. (0! = 1.)")
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Let m and n be arbitrary non-negative integers. Prove that 

 ((2m)!(2n)!)/mn!(m+n)!

is an integer. (0! = 1.)

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