共50条信息
若直线\(l_{1}:x-2y+1=0\)与\(l_{2}:2x+ay-2=0\)平行,则\(l_{1}\)与\(l_{2}\)的距离为\((\) \()\)
平行直线\(l_{1}\):\(x-y+1=0\)与\(l_{2}\):\(3x-3y+1=0\)的距离等于__________.
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