IMO 2009 problema 5

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Omer Cerrahoglu
Euclid
Posts: 34
Joined: Mon Mar 17, 2008 1:08 pm

IMO 2009 problema 5

Post by Omer Cerrahoglu »

Determinati toate functiile \( f:\mathbb{N}^* \rightarrow \mathbb{N}^* \) cu proprietatea ca \( f(a) \), \( b \) si \( f(b+f(a)-1) \) pot fi laturile unui triunghi nedegenerat.
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