已知直线
与曲线
有且仅有1个公共点,则m的取值可能是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df7d0f7e09ccab9e6c8949e3ced309b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7776f8179bc04afd0574c9019945e922.png)
A.![]() | B.![]() | C.1 | D.![]() |
更新时间:2021-11-14 14:14:53
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【知识点】 由直线与圆的位置关系求参数
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【推荐1】已知点
为圆
上一点,点
在圆
外,若满足
的点
有且只有4个,则圆的半径
可以取( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3285a2383fa18025034cf9876175295.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9538c1cb084f439f61ca964e24eb0c73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc44958fdfba90349e5b2543d86ab6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
A.![]() | B.![]() | C.2 | D.![]() |
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【推荐2】已知圆
的方程为
,若圆
上恰好有3个点到直线
的距离为1,则
的方程不可能是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb63dac75f3524d0ca3720a2cc117ca5.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/0f85fca60a11e1af2bf50138d0e3fe62.png)
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