若直线
〔
为参数)与圆
(
为参数)相切,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/015361a71b55c2668be32bbcaf9af3cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de34a29e52979b26d8a822a0d326704b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
A.-4或6 | B.-6或4 | C.-1或9 | D.-9或1 |
2018·北京·三模 查看更多[2]
更新时间:2018-06-16 11:03:18
|
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解题方法
【推荐1】已知直线
与圆
:
交于
两点,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97b9f51dd297ba48d666e671ec17c755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f5d967ad135991b6075ee45df55643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a2979f64c85f82d8975d73ee1c342de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】设O为坐标原点,F为双曲线C:
的一个焦点,过F作C的一条渐近线的垂线,垂足为H,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6cf8bc908b192921416bb2d958ed539.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf4b95e43699d7b38711069c1d9cc81.png)
A.![]() | B.2 | C.![]() | D.4 |
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【推荐1】已知曲线
的参数方程
(
为参数),则其普通方程是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c43ee43e8f2a91c0aecbe2dccb0ed07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
A.![]() | B.![]() | C.![]() | D.![]() ![]() |
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【推荐2】设曲线C的参数方程为
(
为参数),直线
的方程为
,则曲线
上到直线
距离为
的点的个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5383471113e277e30153c91607614a8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e8a3365e99f926b1dafa901ab232152.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
A.1 | B.2 | C.3 | D.4 |
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