Question

[Nyatmax]

\(\hept{\begin{cases}a,b,c>0\\a^4+b^4+c^4=3\end{cases}}\) .Chung minh

a.\(\frac{a^2}{b}+\frac{b^2}{c}+\frac{c^2}{a}\ge3\)

b.\(\frac{a^2}{b+c}+\frac{b^2}{c+a}+\frac{c^2}{a+b}\ge\frac{3}{2}\)

Answer 1

[Nguyễn Thanh Trà]

this not phải vietnamese ok