已知定点
,点
是抛物线
上一动点,点
到直线
的距离为
,则
的最小值是_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6c09b41032e4722c412c2e2427500a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6875d552e9fff3c7d655f3a59b166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ee0af1ee58b2770d38f1476e885efa5.png)
17-18高二下·广西玉林·阶段练习 查看更多[3]
更新时间:2018-04-10 17:13:44
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【知识点】 抛物线上的点到定点和焦点距离的和、差最值
相似题推荐
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适中
(0.65)
名校
【推荐1】设抛物线
的焦点为
,
为抛物线
上一点,
,则
的取值范围是 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54f30ce51506337938bf9848343f04fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1821748a40df69cc4ac4aff61cc42566.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0b9e6530b912f758f9facbae31351c4.png)
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填空题-单空题
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适中
(0.65)
【推荐2】在平面直角坐标系
中,圆
,点
,
为抛物线
上任意一点(异于原点),过点
作圆
的切线
,
为切点,则
的最小值是___ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0a52784f84e9fcf104d7673cb564995.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96ef7e9efc2681546f2320b108a1987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c38d961bb46a2fb43dd2dd2c2355a9a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f71ee762d565295f2ac0603b4d60c95d.png)
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