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1 . 位于德国东部萨克森州的莱科勃克桥(如图所示)有“仙境之桥”之称,它的桥形可近似地看成抛物线的一部分.该桥的高度为
米,跨径为
米,则桥形对应的抛物线的焦点到准线的距离为________ 米.(结果用
,
表示)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/14/87ea882c-51c6-489d-a844-4545d8a4943f.png?resizew=98)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/14/ed8558fd-bcb4-41b1-825c-e3dc06c61aca.png?resizew=106)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/14/87ea882c-51c6-489d-a844-4545d8a4943f.png?resizew=98)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/14/ed8558fd-bcb4-41b1-825c-e3dc06c61aca.png?resizew=106)
您最近一年使用:0次
2021-12-21更新
|
700次组卷
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4卷引用:安徽省合肥市双凤高级中学2022届高三一模文科数学试题
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2 . 已知点
是抛物线
上动点,
是抛物线的焦点,点
的坐标为
,则
的最小值为______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42102c1c07562853219ca5918803a27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edaef66a0582e95fb5c57a405acdea9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aafecdff4e61f7e74e06db9b31c826c.png)
您最近一年使用:0次
2020-04-04更新
|
318次组卷
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3卷引用:安徽省滁州市定远县育才学校2022-2023学年高三上学期开学摸底考试数学试题