IMO - 1972(3)

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Nadim Ul Abrar
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IMO - 1972(3)

Unread post by Nadim Ul Abrar » Tue Jun 21, 2011 9:57 pm

Prove that (2m)!(2n)! Is divisible by m!n!(m+n)! ....
$\frac{1}{0}$
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Tahmid Hasan
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Re: IMO - 1972(3)

Unread post by Tahmid Hasan » Wed Jun 22, 2011 12:01 am

this figure is symmetric,so considering two cases between $m,n$(equality and inequality) would provide a simple solution.
বড় ভালবাসি তোমায়,মা
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Masum
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Re: IMO - 1972(3)

Unread post by Masum » Tue Jul 19, 2011 12:57 pm

You may post your full solution using this idea.
One one thing is neutral in the universe, that is $0$.
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