ineq nice

Sujet: ineq nice Dim 21 Oct 2012, 18:55

a,b,c >=0 montrer que $ineq nice Gif$

Sujet: Re: ineq nice Lun 22 Oct 2012, 12:52

younesmath2012 a écrit:: a,b,c >=0 montrer que $ineq nice Gif$

$ineq nice Gif.download?a^{3}+b^{3}+c^{3}+abc+8%20\geq%204(a+b+c)\\a^3+b^3+c^3+abc\geq&space;\frac{4}{27}(a+b+c)^3&space;\&space;\&space;\&space;(Schur)\\il\&space;suffit\&space;de\&space;demontrer\&space;\frac{4}{27}(a+b+c)^3+8\geq&space;4(a+b+c)\\\Leftrightarrow&space;\frac{1}{27}(a+b+c)^3+1+1\geq&space;a+b+c&space;..$

Sujet: Re: ineq nice Lun 22 Oct 2012, 19:22

bravo jolie reponse !!!

Sujet: Re: ineq nice Lun 22 Oct 2012, 19:37

younesmath2012 a écrit:: bravo jolie reponse !!!

merci

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