问题 选择题 设P1(x1,y1),P2(x2,y2),P3(x3,y3),是反比例函数y=kx(k>0)图象上的点,且x1<x2<0<x3,则下列不等式中正确的是( )A.y1<y2<0<y3B.y1>y2>0>y3C.0<y3<y2<y1D.y2<y1<0<y3 答案 当x1<x2<0时,y2<y1<0,而x3大于0时, y3>0,据此,y2<y1<0<y3,故选D.