x分之1-y分之1=2,则分式x-3xy-y分之4x 5xy-4y
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/18 04:12:39
![x分之1-y分之1=2,则分式x-3xy-y分之4x 5xy-4y](/uploads/image/f/900730-10-0.jpg?t=x%E5%88%86%E4%B9%8B1-y%E5%88%86%E4%B9%8B1%3D2%2C%E5%88%99%E5%88%86%E5%BC%8Fx-3xy-y%E5%88%86%E4%B9%8B4x+5xy-4y)
(x+1)/x²-2x²/(x+1)=1设(x+1)/x²=t,则方程变为:t-2/t=1,即:t²-t-2=0,即(t-2)(t+1)=0∴t1=2t2=-1
1/x+1/y=2则(2x+3xy+2y)/(x-xy+y)分子分母同除以xy=(2/x+2/y+3)/(1/x+1/y-1)=(4+3)/(2-1)=7
由1/x-1/y=3得(y-x)/xy=3题中的式子分子分母同时除以xy得(2/y+3-2/x)/(1/y-2-1/x),通分得【2(x-y)/xy+3】/【(x-y)/xy-2】代入得3/5
1/x-1/y=2(y-x)/xy=2y-x=2xy所以x-y=-2xy原式=[2(x-y)+7xy]分之[(y-x)+xy]=[2(-2xy)+7xy]分之[(2xy)+xy]=3xy]分之3xy=
[1/(x-y)-1/(x+y)]÷2y/(x^2-2xy+y^2)=[(x+y)/(x+y)(x-y)-(x-y)/(x+y)(x-y)]÷2y/(x-y)^2=[(x+y-x+y)/(x+y)(x
1/x-1/y=2001则(x-xy-y)/(x-y)=2002/2001
x=5,y=8再问:过程打一下再答:(x+15)(y-6)=(x-1)(y+2)xy-6x+15y-90=xy+2x-y-216y=8x+882y=x+114x-xy=x-3-xy+3y3x=-3+3
3/2(x-2)-x/(x-2)=1/23-2x=x-2-3x=-5x=5/3检验:x=5/3是方程的解∴方程的解是x=5/3再问:你那个是2分之3(x-2)-x分之x-2吗?再答:不是的是2(x-2
1、1/x-1/y=3(y-x)/xy=3y-x=3xyx-y=-3xy原式=[3(x-y)+xy]/[(x-y)-xy]=[3(-3xy)+xy]/[(-3xy)-xy]=-8xy/(-4xy)=2
已知分式4x^2-1分之6x^2+x-2的值为0,则x^-1=∵分式4x^2-1分之6x^2+x-2的值为0∴6x²+x-2=04x²-1≠0(3x+2)(2x-1)=0∴3x+2
答案选择B因为当2x-1≠0,且|x|-1/2=0即x=-1/2请首先关注【我的采纳率】如果不懂,请继续追问!请及时点击【采纳为最佳回答】按钮~如还有新的问题,在您采纳后可以继续求助我!您的采纳是我前
1;=3(x+y)/(x-y)2:x平方/(2x-1-x+1)=x3:=-(2x平方-2x-1)/(3x+1)
已知:1/X-1/Y=5通分:(Y-X)/XY=5,倒数:XY/(Y-X)=1/5.
它们的最最公分母是x²y²1/x²y=y/x²y²1/xy²=x/x²y²再问:当x=()时,分式2x-4分之3的值为负
1/x-1/y=3(y-x)/xy=3y-x=3xy分式的分母=x-2xy-y=(x-y)-2xy=-5xy分子=2x+3xy-2y=2(x-y)+3xy=-3xy所以原式=3/5
1/x+1/y=5(x+y)/x*y=5x+y=5*x*yx+2xy+y=x+y+2xy=5xy+2xy=7xy2x-3xy+2y=10xy-3xy=7xy(2x-3xy+2y)/(x+2xy+y)=
是,但不是分式方程分式是指分母中有未知数的式子再问:不明白……那不是分母都是字母吗?再答:是的,未知数就是字母再答:任何字母都可以代表未知数最常用的是x,y,z,a,b,c。
这个简单啊!3/2-1/(3x-1)=5/(6x-2)先去分母,都乘上6x-22分之3×(6x-2)-(3x-1)分之1×(6x-2)=(6x-2)分之5×(6x-2)2分之18x-6-2=59x-3
等式两边除以xy所以1/y-1/x=1