名校
解题方法
1 . 探照灯、汽车灯等很多灯具的反光镜是抛物面(其纵断面是抛物线的一部分),正是利用了抛物线的光学性质:由其焦点射出的光线经抛物线反射之后沿对称轴方向射出.根据光路可逆图,在平面直角坐标系中,抛物线C:
,一条光线经过点
,与x轴平行射到抛物线C上,经过两次反射后经过点
射出,则光线从点M到点N经过的总路程为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ac62b1ade07205ae2693ec1ab135def.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d4a3b8605f331abb21d9678fc8dfd1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4410a44bd6b0fcd042ce1e68764f6a5.png)
您最近一年使用:0次
2024-01-26更新
|
125次组卷
|
2卷引用:北京市顺义区2023-2024学年高二上学期期末质量检测数学试题
解题方法
2 . 设
为抛物线
的焦点,则点
的坐标为__________ ;若抛物线上一点
满足
,那么点
的横坐标为___________ .
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ff29e80ba6c16e1177e7873a396a7a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
您最近一年使用:0次
3 . 已知点A为抛物线
上一点(点A在第一象限),点F为抛物线的焦点,准线为l,线段AF的中垂线交准线l于点D,交x轴于点E(D、E在AF的两侧),四边形
为菱形,若点P、Q分别在边DA、EA上,
,
,若
则
的最小值为______ ,
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b072ff6d1b83232bebd7d4709ffba4ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e08c14e87a2bcf7090eab2fea73667d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d1074ae4cfaa6c7ab2eabe04bf97513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe7112901e241c4db02f538795d1b79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b8b5ad14031c353573710741dc68549.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bdbdec26c6aa6565eef79515056a036.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41ef5824baf830ec04377a49df11513c.png)
您最近一年使用:0次
23-24高三上·山东德州·期末
解题方法
4 . 若直线
过抛物线
的焦点
且与抛物线交于
两点,
的中垂线交
轴于点
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65e48a2eafd3158d74d0824c6ec1c640.png)
____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65e48a2eafd3158d74d0824c6ec1c640.png)
您最近一年使用:0次
5 . 设点F为抛物线C:
的焦点,点A在抛物线C上,点
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88bee8e70f1fab639be1636c7bce0477.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b072ff6d1b83232bebd7d4709ffba4ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3bdf215e094e894f651c129b89be326.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/103719a03778afac5607b7b2bc325ec1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88bee8e70f1fab639be1636c7bce0477.png)
您最近一年使用:0次
6 . 已知抛物线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a5bbb709522dba9425a6b45ee671298.png)
的焦点为
,准线为
,经过点
且斜率为
的直线与抛物线交于点
(
在
轴上方),过
作
,垂足为
,则
到直线
的距离为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a5bbb709522dba9425a6b45ee671298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b072ff6d1b83232bebd7d4709ffba4ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b33a3f384acb53b5a21521a77ac0b1f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/360496a4f5cc8a5faca5e089ae4f9531.png)
您最近一年使用:0次
名校
解题方法
7 . 已知抛物线
的焦点为
,
,点P为第一象限内的点,且在抛物线C上,则
的最小值为____________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/020f93706a12a66231bdaadb40ae221e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcfd2a3a4afb13aaa6b7f5ea2b4a3a9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6bf3b82ac1583845f084764ff7c85a1.png)
您最近一年使用:0次
解题方法
8 . 已知抛物线
的焦点为
是抛物线上两点,若
8,则
的中点到
轴距离的最小值为_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0d0a522b36799e4bcc6e3645db4d4a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88bee8e70f1fab639be1636c7bce0477.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
您最近一年使用:0次
2024-01-12更新
|
192次组卷
|
2卷引用:云南省大理白族自治州2023-2024学年高二上学期期末教学质量监测数学试题
9 . 已知抛物线
的焦点为
,准线为
,过抛物线上一点
作准线的垂线,垂足为
,若
,且
,则
的值为 ____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7089148c36cb3c39af71de653756396a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4494488bdb23f6d941b60af8726993a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dce6b638da474cdf44a7d556fd6f4255.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
您最近一年使用:0次
2024-01-11更新
|
458次组卷
|
3卷引用:江苏省2023-2024学年高二上学期期末迎考数学试题(B卷)
名校
10 . 已知
为抛物线
上一点,点
到
的焦点的距离为16,到
轴的距离为10,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82ea1be9b9b6bb12afa7e1ce703d1603.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
您最近一年使用:0次
2024-01-09更新
|
645次组卷
|
3卷引用:甘肃省武威市2024届高三上学期阶段调考数学试题