(x-y)的五次方÷(y-x)的三次方(y-x)的两次方

问题描述:

(x-y)的五次方÷(y-x)的三次方(y-x)的两次方

(x-y)^5/[(y-x)^3(y-x)^2]
=(x-y)^5/[-(x-y)^3(x-y)^2]
=(x-y)^5/[-(x-y)^5]
=-1.