“曲线
与圆
有且仅有三个公共点”的充要条件是_________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/159984b0f1191ee27fb8feca907ec5f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dbd2dd328f7c86bc0460a7e100e0fe7.png)
20-21高二上·北京平谷·期末 查看更多[2]
更新时间:2021-01-28 21:56:36
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解题方法
【推荐2】给出如下三个条件:①充要②充分不必要③必要不充分.请从中选择补充到下面横线上.
已知集合
,
,存在实数
使得“
”是“
”的______ 条件.
已知集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/346b0b70347035b0ae88a513d3dc521a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a8c49b3f27a2442cd1fb6aee06600d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐1】已知曲线
,直线
,若对于点
,存在
上的点
和
上的点
,使得
,则
取值范围是_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/169bc8354971c76dcd31eb9821180152.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f49d09c4938389f53aa89cd20d46f02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/739103e7904353fc339841f65b680c61.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd4b2cb65a6f30d04822499d0e1ef9ee.png)
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【推荐2】已知点
,
,直线
:
上存在点
,满足
,则实数
的取值范围是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a19505c1aaf1342d4d5a8e1eda2adb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6678ce473e9fd055f294f99805fe0032.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/109de57c78c5755b64bcba658ee190ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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