(x-y)^0除以(x-y)^-3乘以(y-x)^-2

问题描述:

(x-y)^0除以(x-y)^-3乘以(y-x)^-2
1

(x-y)^0/(x-y)^-3*(y-x)^-2
=1/(x-y)^-3*(x-y)^-2
=1/(x-y)^-1
=x-y