过圆
上一点
的圆的切线方程为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7da5a5588609f47f20c8223a09856936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/797c488729678e74e0825c2e92b544b4.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2017-07-25 00:09:54
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【推荐1】已知点P(1,2)在圆C:
的外部,则k的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9644e30ff407e574a05e22c23b980898.png)
A.![]() | B.k<2 | C.k>2 | D.-2<k<2 |
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【推荐2】设
为坐标原点,
,
是抛物线
与圆
关于
轴对称的两个交点,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82ea1be9b9b6bb12afa7e1ce703d1603.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8614f4d7bcc7e0db58fc7875c889b8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92566e40168d67b63bd6895addda274a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
A.4 | B.2 |
C.![]() | D.![]() |
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【推荐1】过圆
上一点M(-1,2)作圆的切线l,则l的方程是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d35465f3e40ce00a1dce54b943ae183.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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