2 2 2 2 2 2A B C B A CCHO A B C > 0
Câu 5:
2
2
2
2
2
2
a
b
c
b
a
c
Cho
a
b
c
> 0. CMR:
3
4
a
b c
c
a
b
Câu 5:
2
2
2
2
2
2
a
b
c
b
a
c
Cho
a
b
c
> 0. CMR:
3
4
a
b c
c
a
b