为了方便计算,把123456789看成x ,987654321看成y 而且可以看出x＜y 即x-y＜0 a-b=y/x-(y-2002)/(x-2002) =[y(x-2002)-x(y-2002)]/[x(x-2002)] =(xy-2002y-xy+2002x)/[x(x-2002)] =2002(x-y)/[x(x-2002)] 2002＞0,x＞...