Bài toán: Cho $a,b,c>0$ thỏa mãn $a+b+c=6$. Cm:
\[\sqrt{\frac{{{\left( a+b \right)}^{3}}}{a+1}}+\sqrt{\frac{{{\left( b+c \right)}^{3}}}{b+2}}+\sqrt{\frac{{{\left( c+a \right)}^{3}}}{c+3}}\ge 12\]
\[\sqrt{\frac{{{\left( a+b \right)}^{3}}}{a+1}}+\sqrt{\frac{{{\left( b+c \right)}^{3}}}{b+2}}+\sqrt{\frac{{{\left( c+a \right)}^{3}}}{c+3}}\ge 12\]