(1)已知1/X-1/Y=3,求分式(2X+3XY-2Y)/(X-2XY-Y)的值.
来源:学生作业帮 编辑:大师作文网作业帮 分类:综合作业 时间:2024/11/17 16:07:36
(1)已知1/X-1/Y=3,求分式(2X+3XY-2Y)/(X-2XY-Y)的值.
(2)化简:(x的二次方-2xy+y的二次方-1)/(x-y-1)=
(2)化简:(x的二次方-2xy+y的二次方-1)/(x-y-1)=
(1)∵1/X-1/Y=3∴y-x=3xy
分式(2X+3XY-2Y)/(X-2XY-Y)=[-2﹙y-x﹚+3XY]/[-﹙y-x﹚-2XY]
=﹙-6XY+3XY﹚/﹙-3xy-2xy﹚
=﹙-3xy﹚/﹙-5xy﹚
=3/5
(2):(x的二次方-2xy+y的二次方-1)/(x-y-1)=﹙x²-2xy+y²-1﹚/﹙x-y-1﹚
=[﹙x-y﹚²-1]/﹙x-y-1﹚
=[﹙x-y+1﹚﹙x-y-1﹚]/﹙x-y-1﹚
=x-y+1
分式(2X+3XY-2Y)/(X-2XY-Y)=[-2﹙y-x﹚+3XY]/[-﹙y-x﹚-2XY]
=﹙-6XY+3XY﹚/﹙-3xy-2xy﹚
=﹙-3xy﹚/﹙-5xy﹚
=3/5
(2):(x的二次方-2xy+y的二次方-1)/(x-y-1)=﹙x²-2xy+y²-1﹚/﹙x-y-1﹚
=[﹙x-y﹚²-1]/﹙x-y-1﹚
=[﹙x-y+1﹚﹙x-y-1﹚]/﹙x-y-1﹚
=x-y+1
已知1/x+1/y=3,求分式3x-2xy+3y/x+xy+y的值
已知,1/x+1/y=5.,求分式3x+xy+3y/x-2xy+y的值
八下数学分式(1)已知1/x-1/y=5,求分式3x+5xy-3y/x-3xy-y的值(2)已知x+1/x=3,求分式x
(1)已知1/X-1/Y=3,求分式(2X+3XY-2Y)/(X-2XY-Y)的值.
已知1/x-1/y=3,求分式(4x-5xy-4y)/(3x-2xy-3y)的值
初中数学分式已知x/y=2,求(x*x-xy+3y*y)/x*x+xy+6y*y的值
1/x-1/y=4,求分式(3x+xy-3y)/(x-2xy-y)
已知x-y/xy=3,求分式2x+3xy-2y/x-2xy-y的值.
1/x+1/y=3.求分式3x-2xy+3y/x+xy+y的值
已知1/x+1/y=5,则分式(3x+2xy+3y)/(2x-xy-2y)的值是多少?
已知1/x-1/y=5,求分式y+xy-x/2x+7xy-2y的值.
已知1/X-1/y=5,求分式(y+xy-x)/(2x+7xy-2y)的值