已知x分之1-y分之1=2001,求分式x-y分之x-xy-y的值.

问题描述:

已知x分之1-y分之1=2001,求分式x-y分之x-xy-y的值.

1/x-1/y=2001则(x-xy-y)/(x-y)=2002/2001