Inegalitate

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andy crisan
Pitagora
Posts: 56
Joined: Sun Dec 28, 2008 5:50 pm
Location: Pitesti

Inegalitate

Post by andy crisan »

Fie \( a,b,c>0 \). Sa se arate ca are loc inegalitatea
\( \frac{\sum_{cyc}ab}{\sum_{cyc}a}\geq \sqrt[3]{abc} \)
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Marius Mainea
Gauss
Posts: 1077
Joined: Mon May 26, 2008 2:12 pm
Location: Gaesti (Dambovita)

Post by Marius Mainea »

Vezi a=b=1 si c=8.
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