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Inegalitate in triunghi

 
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Sorin Borodi



Joined: 07 Feb 2010
Posts: 1
Location: Dej jud.Cluj
PostPosted: Tue Feb 09, 2010 12:28 am    Post subject: Inegalitate in triunghi Reply with quote
Cine stie ? Inegalitatea de mai jos este una cunoscuta ?
"In orice triunghi,suma patratelor bisectoarelor este mai mare decat de 5 ori aria".
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Marius Mainea
Gauss


Joined: 26 May 2008
Posts: 1075
Location: Gaesti (Dambovita)
PostPosted: Thu May 20, 2010 9:12 pm    Post subject: Reply with quote
l_a^2+l_b^2+l_c^2\ge 3S\sqrt{3}
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