求m,n使y=(m-1)x-n+7满足垂直于7x-y+15=0的直线方程
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求m,n使y=(m-1)x-n+7满足垂直于7x-y+15=0的直线方程
求m,n使y=(m-1)x-n+7满足垂直于7x-y+15=0的直线方程
求m,n使y=(m-1)x-n+7满足垂直于7x-y+15=0的直线方程
(m-1)×7=-1
∴7m-7=-1
∴7m=6
m=6/7
n任意
利用斜率互为负倒数 m-1=-1/7
求m,n使y=(m-1)x-n+7满足平行于X轴的直线方程
求m,n使y=(m-1)x-n+7满足垂直于7x-y+15=0的直线方程
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