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