A, CHO A, B, C > 01 1 1A B B C A C      A B B C A C A B C...

câu 2: - DE THI HSG TOAN LOP 8 CO DAP AN câu 2: - DE THI HSG TOAN LOP 8 CO DAP AN
DE THI HSG TOAN LOP 8 CO DAP AN

Câu 2:

a, Cho a, b, c > 0

1 1 1

a b b c a c

  

    

a b b c a c a b c

CMR:

2

2

2

2

2

2

b, Cho 0 a, b, c 1

1

abc

a b c  

+ abc

CMR: a+b+c+