已知直线
与直线
平行,求a的值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc39d5203b918c24ab32b651a31f058a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c663b10b8ff14f4bcb21a11f63eabbac.png)
21-22高二·全国·课后作业 查看更多[2]
更新时间:2022-02-28 17:54:22
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【知识点】 已知直线平行求参数
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解答题-问答题
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解题方法
【推荐1】已知直线
和直线
,求分别满足下列条件的
的值.
(1)直线
过点
,且直线
和
垂直;
(2)若直线
和
平行,且直线
在
轴上的截距为
;
(3)若直线
和
重合.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bf62239b21cefa8dff6fab58a973ea3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc3deb013c9e29cbb5e020ea923f4cbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
(1)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcbcd0aebdd8bd688d108834747009f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81fb134b2b48acc99213fff6ccfee65f.png)
(3)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
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解答题-问答题
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容易
(0.94)
名校
【推荐2】已知直线
:
,
:
,问实数
分别取何值时,直线的位置关系如下:
(1)相交;
(2)平行;
(3)重合.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a56dc973d0c69d6d43507dd7f50155e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8677df2dbd9b3182c79afc24a1d8563a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(1)相交;
(2)平行;
(3)重合.
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