CHO A, B, C > 0 2 2 2A B C A B C2 2 2 2 2 2B C  C A  A B  B C C...

câu 5: - DE THI HSG TOAN LOP 8 CO DAP AN
DE THI HSG TOAN LOP 8 CO DAP AN

Câu 5:

Cho a, b, c > 0

2

2

2

a b c a b c

2

2

2

2

2

2

b cc aa bb c c a a b  

     

CMR: