C
canmongtay


giup minh voi minh dang rat can cam on nhieu nha
cho 3so a,b,c thoa man abc=1
chung minh
1\a^3(b+c) +1\b^3(c+a) +1\c^3(b+a) \geq 3\2
xong rui
cam on nhiu nha

cho 3so a,b,c thoa man abc=1
chung minh
1\a^3(b+c) +1\b^3(c+a) +1\c^3(b+a) \geq 3\2
xong rui
cam on nhiu nha