两边乘以(x-2)(x+2)得(x+2)+k(x-2)=3(k+1)x=1+2k 当k=-1时,左边≠右边,无解k≠-1,有增根即分母为0得x=2,x=-2(1)若 x=(2k+1)/(k+1)=22k+1=2k+2不成立(2)若x=(2k+1)/(k+1)=-22k+1=-2k-2k=-3/4所以k=-1,k=-3/4...