1/x-2+k/x+2=4/x²-4
(x+2+kx-2k)/(x²-4)=4/(x²-4)
x+kx=4-2+2k
x=(2+2k)/(1+k)
∵关于x的分式方程1/x-2+k/x+2=4/x²-4有增根x=2
∴2=(2+2k)/(1+k)
2+2k=2+2k恒成立
k可取任意值
1/x-2+k/x+2=4/x²-4
(x+2+kx-2k)/(x²-4)=4/(x²-4)
x+kx=4-2+2k
x=(2+2k)/(1+k)
∵关于x的分式方程1/x-2+k/x+2=4/x²-4有增根x=2
∴2=(2+2k)/(1+k)
2+2k=2+2k恒成立
k可取任意值