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nguyendamy0405
2 năm trước
Cho a,b,c>0 và P=$\frac{a}{a+b}$ +$\frac{b}{b+c}$ +$\frac{c}{c+a}$ .Khi đó. A.1<P<2 B.P>$\frac{3}{2}$ C. 0<P<1 D.2<P<3
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