Cho a,b,c>0 ; a+b+c=3
1) Tìm Min P
P=$\frac{a^2}{\sqrt{2a^2+ab+b^2}}+\frac{b^2}{\sqrt{2b^2+bc+c^2}}+\frac{c^2}{\sqrt{2c^2+ca+c^2}}$
2) Tìm max Q
Q=$\frac{2}{3+ab+bc+ca}+\sqrt[3]{\frac{abc}{\left ( 1+a \right )\left ( 1+b \right )\left ( 1+c \right )}}$
- Dung Dang Do yêu thích