1 . 已知抛物线
的焦点为F,过原点O作斜率为
的直线交C于点A,取OA的中点B,过点B作斜率为
的直线l交x轴于点D,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb4dd4670828f75bc573b52cdd02e1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6bdac20e214b2cb3bd07f8d4778dcca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53fc303cfac1c7534451fb0789e68340.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c99b0c57dbff88d29ff0f34871b534d.png)
A.1 | B.2 | C.4 | D.与k值有关 |
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名校
2 . 斜率为
的直线
过抛物线
的焦点,若直线
与圆
相切,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827ccf0c04aa941ba20d5f4c6068b46b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/208d77289e145956fe07d6d8a6287324.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bac4d3d2be66e9f25b59e3a94f235e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
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2020-08-17更新
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314次组卷
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8卷引用:2020届宁夏回族自治区银川一中高三第二次模拟考试数学(文)试题
2020届宁夏回族自治区银川一中高三第二次模拟考试数学(文)试题2020届广东省广州市高三二模文科数学试题2020届广东省广州市高三下学期综合测试(二)数学(文)试题2020届河北省邢台市高三上学期第四次月考数学(文)试题(已下线)专题05 抛物线及其性质-2020年高考数学(理)母题题源解密(全国Ⅲ专版)(已下线)专题07 抛物线及其性质-2020年高考数学(文)母题题源解密(全国Ⅲ专版)(已下线)【新教材精创】2.7.2+抛物线的几何性质(2)-B提高练-人教B版高中数学选择性必修第一册湖南省益阳市箴言中学2021-2022学年高三上学期第三次模拟考试数学试题
名校
解题方法
3 . 已知圆
:
,直线
与圆
相切,且直线
:
与椭圆
:
相交于
两点,
为原点.
(1)若直线
过椭圆
的左焦点,且与圆
交于
两点,且
,求直线
的方程;
(2)如图,若
的重心恰好在圆上,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3503d330608e7138d1b529aba4512fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bae01434c3c301ce3d455372cd09ea50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15b256345d7109e081b7c895591e995d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/271e595c257e4c0ade90a9bbbf0e6b0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5b1b15a4605fce993cb13aefbf40360.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(1)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfd71679516fa8be63f61af50de58090.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)如图,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fdc02f00cf00a6dfd88b53a90f1f7a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/20/b318fe7d-70b0-4df8-be82-4cf6b6774403.png?resizew=212)
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