21-22高二·江苏·课后作业
1 . 分别写出下列直线的斜率以及它们在x轴、y轴上的截距:
(1)
;
(2)
;
(3)
;
(4)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20b8d3564d7ae5687f69b64b150c4b35.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25000c067a3eb6df8ddcd6caa9d1dca5.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e622e2b8344051e9041393ae5d5ee0c.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d33b680d8ccebbfc88e190b965fa816c.png)
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21-22高二·江苏·课后作业
解题方法
2 . 光线沿直线
射入,经过x轴反射后,反射光线与以点
为圆心的圆C相切,求圆C的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638c8ebe4d2e418f1783269f71ef3826.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c17a69b88e284464b5a38b358acbd1d0.png)
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21-22高二·江苏·课后作业
解题方法
3 . 分别根据下列条件,求直线的方程:
(1)斜率为
,且过两条直线
和
的交点;
(2)过两条直线
和
的交点和原点;
(3)过两条直线
和
的交点,且垂直于直线
;
(4)过两条直线
和
的交点,且平行于直线
.
(1)斜率为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/347dff2c9df871800fdd0fad0c867fdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dcaada7649455fbebcdbdbb9a94e6a1.png)
(2)过两条直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8bf4c5441af2933c5bd4422b3dfad28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5be5e9da07e14cdc3898d83f9f175831.png)
(3)过两条直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1fd72f36c81a55cafa92739ee87f743.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9914263ffebdc0aa082603879e8cd847.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/198423f0798da7ce226576b97a1f289e.png)
(4)过两条直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc39d5203b918c24ab32b651a31f058a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59b2caf6048aa0807d8ba591963ff6e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34f8c3f9d839a655f9df464aadd7c1a8.png)
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21-22高二·江苏·课后作业
解题方法
4 . 已知
的三个顶点为
,
,
,求AB边上高的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9c59f0e35b7ae5206e45878934482b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14168792b74b97b8bc51531604ba36b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d97e0f5484c4853a8481ff4f8547f7a6.png)
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21-22高二·江苏·课后作业
5 . 分别写出经过下列两点的直线的方程:
(1)
,
;
(2)
,
;
(3)
,
;
(4)
,
;
(5)
,
;
(6)
,
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2e88ebfb5c0d6cce558b515be06404d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2c7b74fd862d7e3f35e40ae1f626c4c.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3654254401fc902c3cb4912969f21f88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afa482d7bcaa385bfc3548b42a4bfb60.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b12f5329716234ea36d40f9058f8270a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad42625f296d2a4b65180e2f7b776beb.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71a3619ccbcf65312754a970647014e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b12f5329716234ea36d40f9058f8270a.png)
(5)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb0e705301752424a492f6277ed7774e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd243fab0af865af67a2ab817e909cf5.png)
(6)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fab8a0cc6504aa4c3a38006f5394b4c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1803dc3c76fd2b51696647aa18602412.png)
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21-22高二·江苏·课后作业
解题方法
6 . 已知直线l过点
,点
和
到l的距离相等,求直线l的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/530e5817131adf2c05b99ff18eb9060f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e3ccc38868099bc4d542e00e0b66685.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7120e0d3bb936a53436924b6da076cf4.png)
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21-22高二·江苏·课后作业
7 . 已知
的一条内角平分线CD的方程为
,两个顶点为
,
,求顶点C的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f129d441ab39d195cb2580c46065d0fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/115a0c87ac14dbb770c95d74d6e26073.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb6fd712d967a36c027693a54f91470.png)
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21-22高二·江苏·课后作业
解题方法
8 . 如图,由原点O向直线
作垂线ON,垂足为N.设
,ON与x轴正方向所成的角为
.
的方程为
;
(2)利用上面的方程推导点
到直线
的距离公式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccbb6a528a39bdc4b4496605a4d3f5cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4a19b2e42c49f3ff978d1d22e7871ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19c1fbb2c0c27bd9b3bc737da0a7baa8.png)
(2)利用上面的方程推导点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc26262f7a1603369462c7c2f2197a42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6b6e44dd054b54f89e7c237eb1428da.png)
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21-22高二·江苏·课后作业
9 . 已知点
关于直线l的对称点为
,求直线l的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ca979687ffb2214e747525635a6912c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f855bbeb00d652786e768bc4fa64d74.png)
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