若1/x-1/y=3,5x+3xy-5y/3x-xy-3y
来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/24 02:11:51
若1/x-1/y=3,5x+3xy-5y/3x-xy-3y若1/x-1/y=3,5x+3xy-5y/3x-xy-3y若1/x-1/y=3,5x+3xy-5y/3x-xy-3y1/x-1/y=(y-x)
若1/x-1/y=3,5x+3xy-5y/3x-xy-3y
若1/x-1/y=3,5x+3xy-5y/3x-xy-3y
若1/x-1/y=3,5x+3xy-5y/3x-xy-3y
1/x-1/y=(y-x)/xy=3
所以y-x=3xy
x-y=-3xy
所以原式=[5(x-y)+3xy]/[3(x-y)-xy]
=[5(-3xy)+3xy]/[3(-3xy)-xy]
=-12xy/(-10xy)
=6/5
若x-y=4,xy=1,则(2x+y-2xy)-(3x+2y+xy)-(4xy+3y-5x)=
若1/x-1/y=3,5x+3xy-5y/3x-xy-3y
若1/x+1/y=5,求3x+4xy+3y/x+3xy+y的值
若1/X-1/Y=3,求5X+2XY-5Y/X-4XY-Y
若1/x-1/y=3,求5x+2xy-5y/x-4xy-y的值
若1/x+1/y=2,则(2x-xy+2y)÷(3x+5xy+3y)
已知xy/x+y=1/2,则代数式3x-5xy+3y/-x+3xy-y=
(-2xy+2x+5y)-(3xy+2y-2x)-(x+4y+xy)其中x-y=4xy=-1
若x+y=-1,则x^4+5x^3y+x^2y+8x^2y^2+xy^2+5xy^3+y^4=( )若x+y=-1,则x^4+5x^3y+x^2y+8x^2y^2+xy^2+5xy^3+y^4=( )
若1/x-1/y=2,求3x-2xy-3y/x-xy-y的值3x-2xy-3y/x-xy-y 不好意思,是3x-2xy-3y/x-2xy-y
若(x+1)^2+|y-2|=0,求3x^2-[5xy-(x^2y-3xy)+4x^2y-8xy]的值
4xy-[(x²+5xy-y²)-(3xy-1/2y)]x=3,y=-6
若实数x,y满足1/x-1/y=5,则分式3x-2xy-3y/x+xy-y的值等于?
【数学】已知 1/x-1/y=3 求 5x-xy-5y / x-2xy-y=?已知 1/x=1/y 求 2x-3xy-2y / x-2xy-y=?
已知1/x+1/y=5,求x+y+3xy/2x-4xy+2y的值,已知1/x+1/y=5,x+y+3xy/2x-4xy+2y的值,
先化简,再求值:{xy(x²-3y)+3xy²}(-2xy)+x³y²(2x-y),其中x=-1/2,y=-5
5xy平方-2x平方y+[3xy平方-(4xy-2x平方y-2x平方y)],其中x=-2,y=-1求值
1/x-1/y=x,求5y+xy-5y/y-xy-x=?