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执教教师 沈丽芳 2004.9

课题:直线的方程(一). 执教教师 沈丽芳 2004.9. 引入:. 我们知道,两点可以并且只可以确定一条直线,如果只给出一点,那么经过这点可以画出无数条直线。这就是说,经过一点,不能确定一条直线,但是,如果在给出一点的同时,又给出一个方向,那么这条直线也就能唯一确定了. 提出问题:. 1. 2. 3. 解:. 问题( 4 ):. 解:. 1. 2. 导出概念:. 3. 例题讲解:. 1. 解: 由题意知,. 2. 解:. 3. 解:. 4. 解法一:. 解法二:. 提问:. 1 、 直线方程的概念;. 课堂小结.

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执教教师 沈丽芳 2004.9

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  1. 课题:直线的方程(一) 执教教师 沈丽芳 2004.9

  2. 引入: 我们知道,两点可以并且只可以确定一条直线,如果只给出一点,那么经过这点可以画出无数条直线。这就是说,经过一点,不能确定一条直线,但是,如果在给出一点的同时,又给出一个方向,那么这条直线也就能唯一确定了

  3. 提出问题: 1. 2. 3. 解:

  4. 问题(4): 解:

  5. 1. 2. 导出概念:

  6. 3.

  7. 例题讲解: 1. 解:由题意知,

  8. 2. 解: 3. 解:

  9. 4. 解法一: 解法二: 提问:

  10. 1、直线方程的概念; 课堂小结 2、直线的方向向量的概念; 3、直线的点方向式方程的概念及其应用。 作业布置: 书P62 习题11.1/1,2,4,5

  11. 谢谢莅临指导

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