两边乘x(x-1)(x-2a)x-3(x-1)=x(x-1)x²-2ax-3x+3=x²-x(2a+2)x=3若a=-1,2a+2=0,此时无解a≠-1则x=3/(2a+2)无解是则是增根,所以分母为0x=3/(2a+2)=0,无解x=3/(2a+2)=1,a=1/2所以a=-1,a=1/2...