1.已知1/x-1/y=4,求分式2x-3xy-2y/2xy-x+y的值2.当m为何值时,分式方程3/x+6/x-1=x+m/x²-x,(1)有根;(2)有正根.3.从甲地到乙地有两条路,每条路都是3km,其中第一条是平路,第二条有1km的上坡路,2km的下坡路.
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![1.已知1/x-1/y=4,求分式2x-3xy-2y/2xy-x+y的值2.当m为何值时,分式方程3/x+6/x-1=x+m/x²-x,(1)有根;(2)有正根.3.从甲地到乙地有两条路,每条路都是3km,其中第一条是平路,第二条有1km的上坡路,2km的下坡路.](/uploads/image/z/989161-25-1.jpg?t=1.%E5%B7%B2%E7%9F%A51%2Fx-1%2Fy%3D4%2C%E6%B1%82%E5%88%86%E5%BC%8F2x-3xy-2y%2F2xy-x%2By%E7%9A%84%E5%80%BC2.%E5%BD%93m%E4%B8%BA%E4%BD%95%E5%80%BC%E6%97%B6%2C%E5%88%86%E5%BC%8F%E6%96%B9%E7%A8%8B3%2Fx%2B6%2Fx-1%3Dx%2Bm%2Fx%26sup2%3B-x%2C%281%29%E6%9C%89%E6%A0%B9%3B%282%29%E6%9C%89%E6%AD%A3%E6%A0%B9.3.%E4%BB%8E%E7%94%B2%E5%9C%B0%E5%88%B0%E4%B9%99%E5%9C%B0%E6%9C%89%E4%B8%A4%E6%9D%A1%E8%B7%AF%2C%E6%AF%8F%E6%9D%A1%E8%B7%AF%E9%83%BD%E6%98%AF3km%2C%E5%85%B6%E4%B8%AD%E7%AC%AC%E4%B8%80%E6%9D%A1%E6%98%AF%E5%B9%B3%E8%B7%AF%2C%E7%AC%AC%E4%BA%8C%E6%9D%A1%E6%9C%891km%E7%9A%84%E4%B8%8A%E5%9D%A1%E8%B7%AF%2C2km%E7%9A%84%E4%B8%8B%E5%9D%A1%E8%B7%AF.)
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