解题方法
1 . 设椭圆
的离心率等于
,拋物线
的焦点
是椭圆
的一个顶点,
分别是椭圆的左右顶点.
(1)求椭圆
的方程;
(2)动点
为椭圆上异于
的两点,设直线
的斜率分别为
,且
,求证:直线
经过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e5578ca83f5bd5c285994061b9c015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ebaa32f4f1f4f807ca9aeb7fb29951.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9f5f4ad0caac5a0fecb64f3908d2290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ebaa32f4f1f4f807ca9aeb7fb29951.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ddfa25e097562b856ddd5e7c0758ee2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90963760acac7bfad3ae03088c6c80b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c3071b3b063a35df2196580f20315ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
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2 . 设抛物线E:
的焦点为F,从点F发出的光线经过E上的点
不同于E的顶点
反射,可证明反射光线平行于E的对称轴,这种特点称为抛物线的光学性质.过E上的动点A向准线l作垂线,垂足为B,过点A的直线m与E相切,设m交l于点C,连接CF,FB,FB交AC于点D,则以下结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b3932717847eb0859019f07a7445ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
A.m平分![]() | B.![]() |
C.![]() ![]() | D.点D在定直线上 |
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3 . 设过抛物线
对称轴上的定点
,作直线
与抛物线交于
两点,且
,相应于点
的直线
称为抛物线的“类准线”.
(1)若
,求
的值;
(2)若点
是“类准线”
上任意一点,设直线
(其斜率都存在)的倾斜角依次为
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42102c1c07562853219ca5918803a27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fa4061a149f863b7ac4dd939f34ffc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac991b1781da9df3cb4e7f1524c05032.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/709887c8b7a179f0015b361b4979b939.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d9ca217fc5968a9b582b6cd8e898312.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c19fd0c317b0fd48e8ea57a6e793693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61ba63ad02b1d5af2982fac3d91eb15c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f44dbccbec6f1edfb1f82ecb7f148812.png)
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名校
4 . 已知抛物线
的焦点
到准线的距离为2,圆
与
轴相切,且圆心
与抛物线
的焦点重合.
(1)求抛物线
和圆
的方程;
(2)设
为圆
外一点,过点
作圆
的两条切线,分别交抛物线
于两个不同的点
和点
.且
,证明:点
在一条定曲线上.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e6c830bfa9a1b979a1a9665166424bf.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fcaad42bf2523650e7e52f6f83244b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e3a1467ecf286e3cadaf5aa006606f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a4f69ea33f31123544adb144786c8bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/062aa1fe63adc386230d0c06c1479e0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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2022-12-21更新
|
4968次组卷
|
13卷引用:广东省广州市2023届高三一模数学试题
广东省广州市2023届高三一模数学试题河北省衡水市第十三中学2023届高三上学期1月月考数学试题陕西省西安市西北工业大学附属中学2022-2023学年高三上学期1月期末理科数学试题 (已下线)专题8 解析几何 第4讲 圆锥曲线中的定点,定值,探究性问题(已下线)模块十二 解析几何-2广东实验中学2023届高三第三次阶段考试数学试题江苏省徐州市新沂市第三中学2023届高三下学期3月月考数学试题江苏省南通市海安高级中学2023届高三下学期一模数学试题(已下线)专题8-2 圆锥曲线综合大题归类(讲+练)-2福建省泉州第五中学2022-2023学年高二下学期第二次临考数学仿真模拟试题(B)(已下线)重难点突破13 切线与切点弦问题 (五大题型)(已下线) 第3章 圆锥曲线的方程单元测试能力卷-2023-2024学年高二数学上学期人教A版(2019)选择性必修第一册(已下线)专题18 圆锥曲线高频压轴解答题(16大题型)(练习)
5 . 已知抛物线
,直线
与抛物线C于A,B两点,M是线段AB的中点,过M作x轴的垂线交C于点N.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/7/8f834a98-e550-414b-9cca-a6410c45bcb9.png?resizew=150)
(1)若M的坐标是
,求k的值;
(2)当
时,证明:抛物线C在点N处的切线与AB平行.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2bc3890170ca8e3295287248f5ff0b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f24e616b5a35ff372c78c1472f156ab.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/7/8f834a98-e550-414b-9cca-a6410c45bcb9.png?resizew=150)
(1)若M的坐标是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2e88ebfb5c0d6cce558b515be06404d.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
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名校
解题方法
6 . 如图,在平面直角坐标系
中,已知抛物线C:
的焦点为F,准线为l,过点F且斜率大于0的直线交抛物线C于A,B两点,过线段AB的中点M且与x轴平行的直线依次交直线OA,OB,l于点P,Q,N.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/ff1cb042-7fe5-4cc5-bf77-d23cb5cdf398.png?resizew=149)
(1)判断线段PM与NQ长度的大小关系,并证明你的结论;
(2)若线段NP上的任意一点均在以点Q为圆心、线段QO长为半径的圆内或圆上,求直线AB斜率的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/ff1cb042-7fe5-4cc5-bf77-d23cb5cdf398.png?resizew=149)
(1)判断线段PM与NQ长度的大小关系,并证明你的结论;
(2)若线段NP上的任意一点均在以点Q为圆心、线段QO长为半径的圆内或圆上,求直线AB斜率的取值范围.
您最近一年使用:0次
2022-05-05更新
|
1021次组卷
|
4卷引用:江苏省苏锡常镇四市2022届高三下学期5月教学情况调研(二)数学试题
江苏省苏锡常镇四市2022届高三下学期5月教学情况调研(二)数学试题(已下线)考点23圆锥曲线综合应用-2-(核心考点讲与练)-2023年高考数学一轮复习核心考点讲与练(新高考专用)四川省宜宾市叙州区第一中学校2023届高三三诊模拟考试数学(理)试题四川省宜宾市叙州区第一中学校2023届高三三诊模拟数学(文)试题
解题方法
7 . 已知焦点为
的抛物线
经过圆
的圆心,点
是抛物线
与圆
在第一象限的一个公共点且
.
(1)分别求
与
的值;
(2)直线
交
于
,
两点,点
与点
关于
轴对称,直线
分别与直线
,
交于点
,
(
为坐标原点),求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37ab7408ffcefcb8e5e1ad4a9c58f1b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa9603c22239d4a48f4bfaa7d3fa226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9b394f8ea45ba7f0a2b93d4cdf21436.png)
(1)分别求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94a8d6991873e79b298984a95b8954b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5189b13afd79d1bbc748cfff5521ab96.png)
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解题方法
8 . 汽车前照灯主要由光源、反射镜、配光片三部分组成,其中经过光源和反射镜顶点的剖面轮廓为抛物线,而光源恰好位于抛物线的焦点处,这样光源发出的每一束光线经反射镜反射后均可沿与抛物线对称轴平行的方向射出.某汽车前照灯反射镜剖面轮廓可表示为抛物线C,已知C的焦点为
,焦距为
,对称轴为l.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/77e52254-422b-4ea7-8af2-7eff1fbb1778.png?resizew=240)
(1)证明:当光源位于
时,此时发出的一束不与l重合的光线经C反射后与l平行;
(2)设P=2,当光源位于l上由
向C的开口方向平移1个焦距长度的点
时,此时发出的一束不与l重合的光线经C上点M反射后又经过l上的点N,若
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2f7d02cf4037e612d3ee323ed901a3b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/77e52254-422b-4ea7-8af2-7eff1fbb1778.png?resizew=240)
(1)证明:当光源位于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
(2)设P=2,当光源位于l上由
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc257c8d13d1286fa6f34f4bd5799304.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2675e721a547386255bae4dfdca9ff2.png)
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2021-06-21更新
|
649次组卷
|
4卷引用:全国新高考2021届高三数学方向卷试题(B)
全国新高考2021届高三数学方向卷试题(B)(已下线)第06讲 抛物线的简单几何性质-【帮课堂】(已下线)2021年全国高考甲卷数学(文)试题变式题21-23题湖南省长沙市麓山国际实验学校2022-2023学年高二下学期入学考试数学试题
名校
解题方法
9 . 平面内一动点D到直线
的距离比D到点
的距离小1,
(1)求动点D的轨迹C的方程;
(2)已知动直线l过点
,交轨迹C于A,B两点,坐标原点O为
的中点,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6875d552e9fff3c7d655f3a59b166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae045f9b7daebb9f15b8769575f62484.png)
(1)求动点D的轨迹C的方程;
(2)已知动直线l过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6bc1ce0bb051d00c6c75d51a845926.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfe2381b2935a320e50e12c573685206.png)
您最近一年使用:0次
10 . 在平面直角坐标系
中,设点
,直线
,点
在直线
上移动,
是线段
与
轴的交点,
,
.
![](https://img.xkw.com/dksih/QBM/2021/2/1/2648716477890560/2650312173150208/STEM/c5709eb80cf6402ba4b28068fd9a22d8.png?resizew=230)
(1)求动点
的轨迹
的方程;
(2)直线
与曲线
交于
,
两点,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a281e8d50b1a28c8d1af7f181a4c548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4180dae966f648d368a10edf3b7e3c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b7aa3a192ade4294c7bbfe3937984bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5b9d83969b6a8e27e57ab71b34e2b81.png)
![](https://img.xkw.com/dksih/QBM/2021/2/1/2648716477890560/2650312173150208/STEM/c5709eb80cf6402ba4b28068fd9a22d8.png?resizew=230)
(1)求动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26ffdc52431c6a72917f331ad3b3355d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3825ccc273ef9a672a606432d165b866.png)
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