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Moonlight Blue

Moonlight Blue

Member Since 13-07-2017
Offline Last Active 20-11-2017 - 20:28
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Bất đẳng thức

26-10-2017 - 12:57

Cho a,b,c$\geq$0. Chứng minh:

   $\frac{b+c}{2a^{2}+bc}+\frac{a+c}{2b^{2}+ac}+\frac{a+b}{2c^{2}+ab}\geq \frac{6}{a+b+c}$