已知
是抛物线
上的一个动点,则
到直线
和
的距离之和的最小值是________ .
![](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/3d31941587483ebe286dc590de99bf7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dc8ea0bf79c496f92371df881b433cd.png)
20-21高三上·山西大同·阶段练习 查看更多[2]
更新时间:2020-09-16 23:39:16
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【推荐1】已知
、
、
、…、
是抛物线
上不同的点,点
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53104202a549fd3d3b527d933d9ccf2.png)
___________
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【推荐2】设抛物线C∶
(
)的焦点为
,第一象限内的A,B两点都在C上,O为坐标原点,若
,
,则点A的坐标为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fc58c62444bf42a25289c45425a00f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5abd313d4e92a762fb7fb0c1cb65263d.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/189056a4d7cd3b62e03f1c959a465ffd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/699fc9b7e879af4866aaa07848dfb423.png)
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【推荐1】已知焦点为
的抛物线
上有一动点
,点
,则
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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【推荐2】已知点F是抛物线
的焦点,点
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的最小值为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42102c1c07562853219ca5918803a27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff2595e01e8751886a27862cce04e2d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44397211d1486df32b56d8d213695170.png)
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