Edited by mimoza884010, 13-02-2012 - 20:15.
a,b,c dương.$\sqrt{\frac{a^3}{a^3+(b+c)^3}}+...+\sqrt{\frac{c^3}{c^3+(a+b)^3)}}\geqslant 1$
Started By mimoza884010, 13-02-2012 - 20:13
#1
Posted 13-02-2012 - 20:13
mimoza884010
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Cho a,b,c dương.CMR $\sqrt{\frac{a^3}{a^3+(b+c)^3}}+\sqrt{\frac{b^3}{b^3+(a+c)^3)}}+\sqrt{\frac{c^3}{c^3+(a+b)^3)}}\geqslant 1$
#2
Posted 13-02-2012 - 20:39
DBSK
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Bạn xem ở đây nè:Cho a,b,c dương.CMR $\sqrt{\frac{a^3}{a^3+(b+c)^3}}+\sqrt{\frac{b^3}{b^3+(a+c)^3)}}+\sqrt{\frac{c^3}{c^3+(a+b)^3)}}\geqslant 1$
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