CHO A, B, C > 0 2 2 2A B C A B CCMR
Câu 5:
Cho a, b, c > 0
2
2
2
a
b
c
a
b
c
CMR:
2
2
2
2
2
2
b
c
c
a
a
b
b c
c
a
a b
Câu 5:
Cho a, b, c > 0
2
2
2
a
b
c
a
b
c
CMR:
2
2
2
2
2
2
b
c
c
a
a
b
b c
c
a
a b