作业帮如图：分式方程http://hiphotos.baidu.com/%C4%E3%B2%C2%B2%C2%DF%B9____/pic/item/95550031bc315c604e0b4a548db1cb134854772a.jpg
来源：学生作业帮助网 编辑：作业帮 时间：2024/12/01 10:02:59
如图：分式方程http://hiphotos.baidu.com/%C4%E3%B2%C2%B2%C2%DF%B9____/pic/item/95550031bc315c604e0b4a548db1cb134854772a.jpg
如图：分式方程
http://hiphotos.baidu.com/%C4%E3%B2%C2%B2%C2%DF%B9____/pic/item/95550031bc315c604e0b4a548db1cb134854772a.jpg
如图：分式方程http://hiphotos.baidu.com/%C4%E3%B2%C2%B2%C2%DF%B9____/pic/item/95550031bc315c604e0b4a548db1cb134854772a.jpg
1.1/(x-1)+2/(x-2)=3/(x-3)
方程式两边同时乘(x-1)(x-2)(x-3),
(x-2)(x-3)+2(x-1)(x-3)=3(x-1)(x-2)
(x-3)[(x-2)+2x-2]=3x^2-9x+6
3x^2-13x+12=3x^2-9x+6
4x=6,x=3/2
2.5x/(x^2+x-6)+(2x-5)/(x^2+x-6)=(7x-10)/(x^2-6x+8)
(7x-5)/(x^2+x-6)=(7x-10)/(x^2-6x+8)
(7x-5)/[(x+3)(x-2)]=(7x-10)/[(x-2)(x-4)],两边消去（x-2）,
(7x-5)/(x+3)=(7x-10)/(x-4)
(7x-5)(x-4)=(7x-10)(x+3)
7x^2-33x+20=7x^2+11x-30
44x=50
x=25/22
3.1/(x^2-x)=1/(2x-x^2)-4/(x^2-3x+2)
1/[x(x-1)]=1/[x(2-x)]-4/[(x-1)(x-2)]
4/[(x-1)(x-2)]=(x-1)/[x(x-1)(2-x)]-(2-x)/[x(x-1)(2-x)]
4/[(x-1)(x-2)]= (2x-3)/[x(x-1)(2-x)],方程两边同时消去（x-1）(x-2)
4= -(2x-3)/x
4x= -2x+3
6x= 3
x=1/2
(x-3)(x-2)+2(x-1)(x-3)=3(x-1)(x-2)
x*x-5x+6+2x*x-8x+6=3x*x-9x+6
4x=6
x=1.5
还有两个，你给我追问一下要不发不了