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Cho a, b, c > 0 và a + b + c =1.
CMR: [TEX]\frac{a^2+b}{b+c}+\frac{b^2+c}{c+a}+\frac{c^2+a}{a+b} \geq 2[/TEX]
CMR: [TEX]\frac{a^2+b}{b+c}+\frac{b^2+c}{c+a}+\frac{c^2+a}{a+b} \geq 2[/TEX]
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