已知1/x+1/y=2,求分式3x+7xy+3y/2x-5xy+2y的值
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/07/22 17:00:01
已知1/x+1/y=2,求分式3x+7xy+3y/2x-5xy+2y的值
![已知1/x+1/y=2,求分式3x+7xy+3y/2x-5xy+2y的值](/uploads/image/z/3223634-50-4.jpg?t=%E5%B7%B2%E7%9F%A51%2Fx%2B1%2Fy%3D2%2C%E6%B1%82%E5%88%86%E5%BC%8F3x%2B7xy%2B3y%2F2x-5xy%2B2y%E7%9A%84%E5%80%BC)
1/x+1/y=(x+y)/xy=2
x+y=2xy
(3x+7xy+3y)/(2x-5xy+2y)
=[3(x+y)+7xy]/[2(x+y)-5xy]
=(6xy+7xy)/(4xy-5xy)
=13xy/(-xy)
=-13
x+y=2xy
(3x+7xy+3y)/(2x-5xy+2y)
=[3(x+y)+7xy]/[2(x+y)-5xy]
=(6xy+7xy)/(4xy-5xy)
=13xy/(-xy)
=-13
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
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
已知x-y/xy=3,求分式2x+3xy-2y/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=2,求分式3x-7xy+3y/2x-5xy+2y的值
已知1/x+1/y=2,求分式3x+7xy+3y/2x-5xy+2y的值
1/x+1/y=3.求分式3x-2xy+3y/x+xy+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
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-x+xy+y/2x+7xy-2y