已知分式方程x-1分之x+x-1分之k-x+1分之x=0无解.求实数k的值

x/(x-1) +k/(x-1) -x/(x+1)=0无解,(x+k)/(x-1)=x/(x+1)无解。化简 x^2-x=x^2+(k+1)x+k 无解(k+2)x=-k 那么 K=-2