急需(x方+xy/x)的负1次方÷[(x-y/x)×(x/y-x)]的负5次方

问题描述:

急需(x方+xy/x)的负1次方÷[(x-y/x)×(x/y-x)]的负5次方

=[x/x(x+y)] ×[(x-y)/x ×x/(y-x)]的5次方
=1/(x+y) ×(-1)的5次方
=-1/(x+y)