ABC+ BAC+ CAB ≥1A+1B+1C(∀A , B , C>0)C(∀A , B , C>0)

câu 6: - 10 DE THI HK1 TOAN LOP 10 CO DAP AN
10 DE THI HK1 TOAN LOP 10 CO DAP AN

Câu 6:

(1đ)

CMR:

a

bc

+

b

ac

+

c

ab

≥

1

a

+

1

b

+

1

c

(

∀

a , b , c

>0)