名校
1 . 已知圆C过点
,圆心在x轴正半轴上,且与直线
相切.
求圆C的标准方程;
已知过点
的直线1交圆C于A、B两点,且
,求直线1的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b8c1bc582e15c8ae375017eff356fde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55fea239ad769835a277fdd9d0ddd71d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6020485d1f9fa00c394c089b879edd97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7b0f0fef9c1b70d1d66b07e9af3891f.png)
您最近一年使用:0次
2019-03-05更新
|
311次组卷
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4卷引用:陕西省西安市西北工业大学附属中学2023-2024学年高二上学期12月月考数学试卷
2 . 如图,直线
与圆
相切,且与椭圆
相交于
两点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/25/d61ced96-3426-46f6-ad3b-3c0b805ccf8e.png?resizew=197)
(1)若直线
恰好经过椭圆的左顶点,求弦长
;
(2)设直线
的斜率分别为
,判断
是否为定值,并说明理由;
(3)求
面积的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc64ba34f941b2ac154f8d7bc99f915d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb4402aeb853b22f20992156957ef0fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/25/d61ced96-3426-46f6-ad3b-3c0b805ccf8e.png?resizew=197)
(1)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5a5e484dfef494d27bc35ae7b8cf75d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ad608ff2250d3f93f509ef52fff7611.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b881044b5c73db6fcce110525741b02.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
您最近一年使用:0次
2017-11-30更新
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901次组卷
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2卷引用:陕西省黄陵中学2017-2018学年高二(重点班)下学期开学考试数学(文)试题