2k/(x-1) = x/(x^2-x) + (kx+1)/x
2k/(x-1)-x/x(x-1)=(kx+1)/x
两边乘x(x-1)
2kx-x=(kx+1)(x-1)
kx^2-kx+x-1=2kx-x
kx^2-(3k-2)x-1=0
若k=0,则2x-1=0,x=1/2,不是增根
若k不等于0
判别式=9k^2-...
2k/(x-1) = x/(x^2-x) + (kx+1)/x
2k/(x-1)-x/x(x-1)=(kx+1)/x
两边乘x(x-1)
2kx-x=(kx+1)(x-1)
kx^2-kx+x-1=2kx-x
kx^2-(3k-2)x-1=0
若k=0,则2x-1=0,x=1/2,不是增根
若k不等于0
判别式=9k^2-...