L是連接ａ（２，５）’ｂ（６，３）２點的直線．〔求：與L垂直於a點的直線方程
回答 (2)
2008-09-10 5:48 am
M(ab)=(5-3)/(2-6)
=-1/2
so M(與L垂直的直線)=(-1)/(-1/2)
=2
M(ma)=5-y/2-x
2 =5-y/2-x
x=(y-1)/2
y=2x+1
=-1/2
so M(與L垂直的直線)=(-1)/(-1/2)
=2
M(ma)=5-y/2-x
2 =5-y/2-x
x=(y-1)/2
y=2x+1
收錄日期: 2021-04-15 18:20:59
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https://hk.answers.yahoo.com/question/index?qid=20080909000051KK02324