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[img]http://latex.codecogs.com/gif.latex?je~~vous~~propose~~une~~inegalit%C3%A9~~que~~je~~connais~~d%C3%A9ja~~mais~~c'est~~aujourd'hui~~que~~j'ai~~trouv%C3%A9~~la~~solution~~(own):\\~~~~~~a~,~b~,~c%3E0~montrer~~que:~~~~~~%20\fbox{\left%20(%20\frac{a+b+c}{abc}%20\right%20)^3+\sqrt[3]{\frac{ab+bc+ca}{a^2+b^2+c^2}}\geq%2028} [img]

[img]http://latex.codecogs.com/gif.latex?Montrer%20~~que~:~\fbox{\left%20(%20\frac{a+b+c}{abc}%20\right%20)^{3}+\sqrt[3]{\frac{ab+bc+ca}{a^{2}+b^{2}+c^{2}}}}~~a~,~b~,~c%3E0[/img]