已知1/x-1/y=3,求分式(2x-14y-2y)/(x-2xy-y)的值
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/17 13:28:35
已知1/x-1/y=3,求分式(2x-14y-2y)/(x-2xy-y)的值
已知1/x-1/y=3,求分式(2x-14y-2y)/(x-2xy-y)的值
已知1/x-1/y=3,求分式(2x-14y-2y)/(x-2xy-y)的值
依题意:1/x-1/y=3
通分,则(y-x)/xy=3 所以y-x=3xy
(2x-14xy-2y)/(x-2xy-y)
=[2x-14(y-x)/3-2y]/[x-2(y-x)/3-y]
=(20x/3 - 20y/3)/(5x/3 - 5y/3)
=20(x-y)/5(x-y)
=4
是2x-14xy-2y吧?
x-y=-3xy
(2X-14XY-2Y)/(x-2xy-y)
=[2(x-y)-14xy]/[(x-y)-2xy]
=(-6xy-14xy)/(-3xy-2xy)
=20xy/5xy
=4
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=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
解一道分式题已知1/x-1/y=3 求分式(4x-5xy-4y)/(3x-2xy-3y)的值.
已知1/x-1/y=2001,求分式x-xy-y/x-y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
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
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-x+xy+y/2x+7xy-2y
已知1/X-1/y=5,求分式(y+xy-x)/(2x+7xy-2y)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
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
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.
已知1/x -1/y=3,求分式3x+3xy-3y求分式(3x+3xy-3y)/(x-2xy-y)的值~
已知1/x-1/y=3,求分式(2x-14y-2y)/(x-2xy-y)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