有一定难度,那位大哥哥,1、若│x-2y+3│+│x-1│=0,则代数式3(x-y)+2的值为 ;2、若关于x的方程(k2-1)x2+(k-1)x-1=0 是一元一次方程,则k= .3、已知单项式-2a2m+3b5与3a5bm-2的和是单项式,则(m+n)20
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![有一定难度,那位大哥哥,1、若│x-2y+3│+│x-1│=0,则代数式3(x-y)+2的值为 ;2、若关于x的方程(k2-1)x2+(k-1)x-1=0 是一元一次方程,则k= .3、已知单项式-2a2m+3b5与3a5bm-2的和是单项式,则(m+n)20](/uploads/image/z/14097468-12-8.jpg?t=%E6%9C%89%E4%B8%80%E5%AE%9A%E9%9A%BE%E5%BA%A6%2C%E9%82%A3%E4%BD%8D%E5%A4%A7%E5%93%A5%E5%93%A5%2C1%E3%80%81%E8%8B%A5%E2%94%82x-2y%2B3%E2%94%82%2B%E2%94%82x-1%E2%94%82%EF%BC%9D0%2C%E5%88%99%E4%BB%A3%E6%95%B0%E5%BC%8F3%EF%BC%88x-y%29%2B2%E7%9A%84%E5%80%BC%E4%B8%BA+%EF%BC%9B2%E3%80%81%E8%8B%A5%E5%85%B3%E4%BA%8Ex%E7%9A%84%E6%96%B9%E7%A8%8B%EF%BC%88k2-1%EF%BC%89x2%2B%EF%BC%88k-1%EF%BC%89x-1%3D0+%E6%98%AF%E4%B8%80%E5%85%83%E4%B8%80%E6%AC%A1%E6%96%B9%E7%A8%8B%2C%E5%88%99k%EF%BC%9D+.3%E3%80%81%E5%B7%B2%E7%9F%A5%E5%8D%95%E9%A1%B9%E5%BC%8F-2a2m%2B3b5%E4%B8%8E3a5bm-2%E7%9A%84%E5%92%8C%E6%98%AF%E5%8D%95%E9%A1%B9%E5%BC%8F%2C%E5%88%99%28m%2Bn%2920)
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