1 . (1)在直线l上任取两个不同的点
,向量
是直线l的方向向量,则
的坐标为_____________
(2)若k是直线l的斜率,则
=__________ 是它的一个方向向量;若直线l的一个方向向量的坐标为
,其中
,则它的斜率k=_____________
(3)已知直线l经过点
,且斜率为
,则直线的点斜式方程为______________
(4)斜截式
中k是直线的斜率,
是直线的_______________
(5)已知直线
过点
,其中
,则直线的截距式_______________
(6)直线的一般式方程为__________________ (其中
,
不全为0)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4fdc975eefd8901649ea90cff1a19e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd4e5fd273fac49c02beab39164a4fd5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd4e5fd273fac49c02beab39164a4fd5.png)
(2)若k是直线l的斜率,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61ae63f2fdc451ddc190f3483e0209c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82a79a33a83a7ba57a34b5093d1d1d02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38f0e9c04402a0ffdaa25c3e3c82c7dd.png)
(3)已知直线l经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3202fd86cd229f6e052d6a3b2d5c274c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(4)斜截式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(5)已知直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98d4052631bcbf875888c1ca8a4e2712.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/789e0bba2e5fe3d35b3d6d591f8c26fa.png)
(6)直线的一般式方程为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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