(y-1/x)÷（x-1/y）如何计算
问题描述：
(y-1/x)÷（x-1/y）如何计算
答
(y-1/x)÷（x-1/y）
=（xy-1)/x*y/(xy-1)
=y/x
答
=[（xy-1)/x]/[(xy-1)/y]=y/x
答
(y-1/x)÷（x-1/y）=[(yx/x)-1/x]÷[(xy/y)-1/y]
=[(yx-1)/x]÷[(yx-1)/y]
=[(yx-1)/x]*[(y/yx-1)]=y/x
答
(y-1/x)÷（x-1/y）
=(xy-1)/x÷(xy-1)/y
=y/x
答
=(xy-1)/x÷(xy-1)/y
=(xy-1)/x×y/(xy-1)
=y/x