已知直线l过点
,圆C:
,则直线l与圆C的位置关系是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d00d5d8cc31aaca7fc2eafb99eac7629.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a143573e9fe53e6a861154bf5b4c27c3.png)
A.相交 | B.相切 |
C.相离 | D.相交或相切 |
2020高三·湖南·学业考试 查看更多[2]
更新时间:2020-03-13 11:29:31
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【推荐1】已知点P是圆
上一点,点
,则线段
长度的最大值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f832e5dabe5d5bc5b405e4bf84c0c0e2.png)
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A.3 | B.5 | C.7 | D.9 |
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【推荐2】数学中有些优美的曲线显示了数学形象美、对称美、和谐美,曲线
:
就是四叶玫瑰线,则不等式
表示区域所含的整点(即横、纵坐标均为整数的点)个数为( )
![](https://img.xkw.com/dksih/QBM/2021/5/18/2723890192613376/2760522070556672/STEM/c456bbc64d7e4a6994c55f5e6499d6f8.png?resizew=238)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86e9e4c35c9d8262db66e276a72c43a6.png)
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![](https://img.xkw.com/dksih/QBM/2021/5/18/2723890192613376/2760522070556672/STEM/c456bbc64d7e4a6994c55f5e6499d6f8.png?resizew=238)
A.1 | B.4 | C.5 | D.9 |
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【推荐1】已知直线l:xcosα+ysinα+m2+n2=0(α∈R,mn>0),圆O:x2+y2=4m2n2,则直线l与圆O交点的个数为( )个
A.0或1 | B.1或2 | C.0或2 | D.0或1或2 |
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【推荐2】若抛物线
的焦点是
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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