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Wednesday, September 08, 2010
កំណែលំហាត់សមីការអនុគមន៍៖ IMO shortlist 1988
ចូរកំណត់គ្រប់អនុគមន៍ f:\mathbb{N}^*\to \mathbb{N}^* ដែលចំពោះគ្រប់ m,n\in \mathbb{N}^* :
f(f(n)+f(m))=n+m
ចម្លើយ៖
http://www.dahlina.com/education/functional-equation.html
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