若m²+4m+n²-8n+20=0,则n/m的值为 2.若x/a=y/b=z/c=3,则(2x-3y+z)/(2a-3b+c)= (2a-3b+c≠0)若10个数据的平均数是2分之根号2,平方和是10,则方差是若不等式组x<m+1 x>2m-1无解,则m的取值范围
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![若m²+4m+n²-8n+20=0,则n/m的值为 2.若x/a=y/b=z/c=3,则(2x-3y+z)/(2a-3b+c)= (2a-3b+c≠0)若10个数据的平均数是2分之根号2,平方和是10,则方差是若不等式组x<m+1 x>2m-1无解,则m的取值范围](/uploads/image/z/5296152-48-2.jpg?t=%E8%8B%A5m%26%23178%3B%2B4m%2Bn%26%23178%3B-8n%2B20%3D0%2C%E5%88%99n%2Fm%E7%9A%84%E5%80%BC%E4%B8%BA+2.%E8%8B%A5x%2Fa%3Dy%2Fb%3Dz%2Fc%3D3%2C%E5%88%99%EF%BC%882x-3y%2Bz%EF%BC%89%2F%EF%BC%882a-3b%2Bc%EF%BC%89%3D+++++%EF%BC%882a-3b%2Bc%E2%89%A00%EF%BC%89%E8%8B%A510%E4%B8%AA%E6%95%B0%E6%8D%AE%E7%9A%84%E5%B9%B3%E5%9D%87%E6%95%B0%E6%98%AF2%E5%88%86%E4%B9%8B%E6%A0%B9%E5%8F%B72%2C%E5%B9%B3%E6%96%B9%E5%92%8C%E6%98%AF10%2C%E5%88%99%E6%96%B9%E5%B7%AE%E6%98%AF%E8%8B%A5%E4%B8%8D%E7%AD%89%E5%BC%8F%E7%BB%84x%EF%BC%9Cm%2B1+++x%EF%BC%9E2m-1%E6%97%A0%E8%A7%A3%2C%E5%88%99m%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4)
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