

Cho 3 số dương a,b,c thỏa mãn a + b + c = 3 .
CM: [TEX]\sqrt{\frac{a^3}{b+3}} + \sqrt{\frac{b^3}{c+3}}+\sqrt{\frac{c^3}{a+3}} \geq \frac{3}{2}[/TEX]
CM: [TEX]\sqrt{\frac{a^3}{b+3}} + \sqrt{\frac{b^3}{c+3}}+\sqrt{\frac{c^3}{a+3}} \geq \frac{3}{2}[/TEX]