设y=3x／(x²-1),则y+1/y=5/22y²-5y+2=0(2y-1)(y-2)=0y=2或y=1/2于是（1）3x／(x²-1)=23x=2x²-22x²-3x-2=0(2x+1)(x-2)=0x=2或x=-1/2（2）3x／(x²-1)=1/2x²-1=6xx²-6x=1(x-3)...