B
blackdevil21


Cho a,b,c>0 và a+b+c=1
a, C/m [tex]\frac{a+b}{abc}[/tex] \geq 16
b, C/m [tex]\frac{1}{a}+\frac{1}{b}+\frac{1}{c}[/tex] \geq 9
a, C/m [tex]\frac{a+b}{abc}[/tex] \geq 16
b, C/m [tex]\frac{1}{a}+\frac{1}{b}+\frac{1}{c}[/tex] \geq 9