在平面直角坐标系中,已知
,
是圆
上的两个动点,O是坐标原点,且
,则
的最小值是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84bd36d19352628cb54c214436ee3322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e27bd43bc4af1e3b28d0de0cc561b879.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0128793bbbaabe8301b23e4c96ac8583.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81966a1b8c376ed64e8238b7794f439c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8798fa810dcf5e75540835f7c88e17a4.png)
更新时间:2023-05-01 23:55:40
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适中
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解题方法
【推荐1】已知直线
截圆
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所得弦长大于8,则实数
的取值范围是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54479885d4ab2f717d2e97718da04b43.png)
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【推荐2】已知:椭圆
:
,直线
:
,求椭圆
上一点
到直线
的距离的最大值____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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【推荐1】设
为圆
上任意一点,
、
为
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恒为常数,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffd29b2e8192d673308bdf8d5cb6cab.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/393a0e30b023f2a20d366eef481b5eea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/448c0a5ee776d19ce8e42ac9a5fd27c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b4fa8f5c44f442b3281d0af4caa33e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a028899a2a1e01ada60e7c1ad3885bf6.png)
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【推荐2】已知双曲线
的左、右焦点分别为
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a2cfa22139b3e9c9a73500e1ba19f52.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7de1d9b83bdb136f4c1427771125803d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d776753746914c2410a3946c357f35.png)
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【推荐1】直线
分别与
轴,
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两点,点
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上,则
面积的取值范围是______ .
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
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【推荐2】若圆
上恰有2个不同的点到直线
的距离为1,则
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3bcfcc5fdcec676875e253087acc568.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e66b928512479de9eb8c2cf43040034.png)
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