CMR:
a, a+b $\geq$ $\frac{12ab}{9+ab}$ (a,b $\geq$ 0 )
b,$\frac{a}{bc}$ + $\frac{b}{ac}$ + $\frac{c}{ab}$ $\geq$ $\frac{1}{a}$ + $\frac{1}{b}$ + $\frac{1}{c}$ (a,b,c $\geq$ 0 )
Loga
Sinh Học lớp 12
