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解题方法
1 . 若
,
,且
,则r的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb93d2d843d813cda10e6211fc6193b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9735559a65363a649e157d6dcf3c21f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12ba583329b831d06312a1f20edb4a81.png)
A.(0,![]() | B.(0,1] | C.(0,![]() | D.[0,2] |
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2 . 已知圆C的方程为
,若直线
上至少存在一点,使得以该点为圆心,1为半径的圆与圆C有公共点,则
的最大值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e688a33119867f6203dd8e19ed350f3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2d8041c797b98b834c70dbf7d1d4346.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
A.![]() | B.![]() | C.1 | D.![]() |
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2022-10-11更新
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582次组卷
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3卷引用:宁夏青铜峡市宁朔中学2022-2023学年高二上学期期中考试数学(理)试题