[张爸] 求点到线之距离

楼主: winter5690 (bbv)   2013-05-28 23:47:52
各位大大安安
想请问一个题目
find the distance from the point(2,1,3) to the line
x-1/2 = y/-1= z+1/1.
我的作法是: 将x-1/2 = y/-1= z+1/1 写成2x-y+z-1=0
(2,1,3)代入,答案为(5/6)^0.5
但是正确答案不是这个,想问我是哪边出错了?

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