两边乘x^2-4(x+2)+k(x-2)=3x+kx+2-2k=3(k+1)x=1+2kx=(2k+1)/(k+1)无解一种情况是(k+1)x=1+2k,k+1=0,则0*x=-1,不成立,无解第二种情况是有增根即分母为0所以x=2,x=-2x=(2k+1)/(k+1)=22k+1=2k+2,不成立x=(2k+1)/(k+1)=-...