已知1/x-1/y=3,求分式2x+3xy-2y/x-2xy-y的值
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/30 13:37:13
x){}K
+t
+mumlztOQqEQ%PȨ|>i"}5ِiףpP-@
`nn.aX6HL$
fc!f 9M}
]v "M6yv ? =y{F
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2x+3xy-2y/x-2xy-y的值
已知1/x-1/y=3,求分式2x+3xy-2y/x-2xy-y的值
∵1/x-1/y=3
∴y-x=3xy
x-y=-3xy
2x+3xy-2y/x-2xy-y
=[2(x-y)+3xy]/[(x-y)-2xy]
=(-6xy+3xy)/(-3xy-2xy)
=-3xy/(-5xy)
=3/5
已知1/x+1/y=3,求分式3x-2xy+3y/x+xy+y的值
已知1/x-1/y=3,求分式(2x+3xy-2y)/(x-2xy-y)
已知1/x-1/y=5,求分式2x+5xy-2y/3x-xy-3y
已知,1/x+1/y=5.,求分式3x+xy+3y/x-2xy+y的值
解一道分式题已知1/x-1/y=3 求分式(4x-5xy-4y)/(3x-2xy-3y)的值.
1 已知x+1/x=3,求分式x²+1/x²的值 2 已知1/x-1/y=5,求分式xy/y-x的值
急,几道分式计算题分子和分母的最高次项的数为正数 -x²-2x-1/5+4x-3x²已知1/x-1/y=5,求分式3x+5xy-3y/x-3xy-y的值已知x+1/x=3,求分式x²+1/x²的值
已知1/x-1/y=3,求分式3x-xy+3y/x+xy+y的值.
已知1/x-1/y=5、求分式3x+5xy-3y/y-xy-x的值
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x²+1/x²的值.
八下数学分式题1.若分式 x²+2分之x(x-3)的值为0,则分式 x²-1分之2x÷1-x分之2x的值为?2.已知x-3y=0,求 x²-2xy+y²分之2x+y 乘以 (x-y)的值
已知X+1/X=2,求分式X^2+X+1/(3X^2-5X+3)的值
已知x+1/x=2,求分式x平方+x+1/3x平方-5x+3
已知分式(x^2-x+1)/x=3,试求x^2/(x^4+x^2+1)的值.
一条分式数学题已知x y z满足x/x+y + y/z+x + z/x+y =1,求x²/x+y + y²/z+x + z²/x+y的值.3Q
已知2x-y=0,求分式【1+(3*y*y*y/x*x*x-y*y*y)】/【1+(2y/x-y)】的值注:x*x*x-y*y*y=(x-y)*(x*x+xy+y*y)
1.已知3/x=4/y,求分式x^2+2xy/3x^2-y^2的值.2.已知1/x-1/y=3,求分式3x+2xy-3y/x+xy-y的值.3.……(1)已知3/x=4/y,求分式x^2+2xy/3x^2-y^2的值.(2)已知1/x-1/y=3,求分式3x+2xy-3y/x+xy-y的值.(3)已知a/2=b/3=c/4,求分式3a
已知1/x -1/y=3,求分式3x+3xy-3y求分式(3x+3xy-3y)/(x-2xy-y)的值~