Question

[Võ Trà Giang]

a , cho x,y,z >0 ; xyz =1 

CMR: \(\frac{x^3}{\left(1+y\right).\left(1+z\right)}\)+\(\frac{y^3}{\left(1+z\right).\left(1+x\right)}\)+\(\frac{z^3}{\left(1+x\right).\left(1+y\right)}\ge\frac{3}{4}\)

Answer 1

[Tiểu Linh]

cha ôi rk mà cx ko bt

Answer 2

[lưu hoàng hiệp]

khó vcl