在平画直角坐标系
中,直线
交圆
所得弦的中点为
,
为圆
上任意一点,则
长的取值范围是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
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更新时间:2020-05-14 08:46:27
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【推荐1】在平面直角坐标系
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【推荐2】在
中,
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,
是
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【推荐1】在平面直角坐标系
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上,则
到
轴距离的最大值为___________ .
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【推荐2】已知
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【推荐3】阿波罗尼斯(古希腊数学家,约公元前262-190年)的著作《圆锥曲线论》是古代世界光辉的科学成果,它将圆锥曲线的性质网罗殆尽,几乎使后人没有插足的余地.他证明过这样一个命题:平面内与两定点距离的比为常数
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