已知﹙3x/x²-1﹚﹢﹙x²-1/3x﹚=5/2,解方程求x
问题描述:
已知﹙3x/x²-1﹚﹢﹙x²-1/3x﹚=5/2,解方程求x
答
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)...