Questions in category: 解析几何 (Cartesian geometry)
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41. 已知三条平行直线, 求过这三条平行直线的平面或圆柱面方程.

Posted by haifeng on 2014-06-08 15:07:53 last update 2014-06-08 15:07:53 | Answers (2) | 收藏


设这三条直线是

$L_1:\ x=y=z$

$L_2:\ x-1=y=z+1$

$L_3:\ x=y+1=z-1$

求过这三条平行直线的圆柱面方程.

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