已知直线
.
(1)求证:无论实数a为何值时,直线
总经过第三象限;
(2)若直线
经过第一、三象限,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30eb0b2d2f9b4630a3b3c125e2a9e375.png)
(1)求证:无论实数a为何值时,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2019-10-27 10:10:34
|
相似题推荐
解答题-证明题
|
较易
(0.85)
名校
解题方法
【推荐1】设直线
,(
).
(1)求证:直线
恒过定点
,并求出定点
坐标;
(2)若直线
在两坐标轴上的截距相等,求直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e853b6948b9d4ffb88c20b7348e87a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bd9736828195f010db4e1f0a9dea7a4.png)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
您最近一年使用:0次
【推荐2】已知圆
:
,直线
:
.
(1)证明:直线
恒过定点,且直线
与圆
恒交于两点;
(2)求直线被圆
截得的弦长最小时
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41ee745282e1b47f06074eac4bfa70a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be5cd04b417e7f4974a917a6a83e8aec.png)
(1)证明:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)求直线被圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
您最近一年使用:0次
【推荐1】已知点
,点
,且直线
与线段
有公共点,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea717f643cdce1cf106a1d4f9a6297f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd68e1e35d4d0cd74ea8172898cc5fb.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
【推荐2】设k为实数,已知点
,
,且直线
与线段AB恒有公共点,求k的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c28da34849b895986967765f5cca338d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd5fb552c79ab5d45b0aeafc06e58542.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02ebce8b2a915356ed39f36c5bad2ebe.png)
您最近一年使用:0次