m2-6m+9与｜n+1｜互为相反数所以,m2-6m+9+｜n+1｜=0（m-3)^2+｜n+1｜=0又（m-3)^2≥0 且｜n+1｜≥0所以（m-3)^2=0 且｜n+1｜=0m-3=0 且 n+1=0m=3 且 n=-1m/m+n + n/m-n - m2/m2-n2 =3/（3-1）+（-1）/(3+1)-9/(9-1)=...