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Claudiu Mindrila
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Joined: Mon Oct 01, 2007 2:25 pm
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Post by Claudiu Mindrila »

Sa se demonstreze ca oricare ar fi numerele reale \( a,b,c \) are loc inegalitatea: \( a(a+b)^3+b(b+c)^3+c(c+a)^3 \geq 0 \).

21933, G.M. 11-12/1989, Vasile Cirtoaje
elev, clasa a X-a, C. N. "C-tin Carabella", Targoviste
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Marius Mainea
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Joined: Mon May 26, 2008 2:12 pm
Location: Gaesti (Dambovita)

Post by Marius Mainea »

Rezolvarea este in GM 2/1991
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