解题方法
1 . 探照灯、汽车灯等很多灯具的反光镜是抛物面(其纵断面是拋物线的一部分),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
,一条光线经过
,与
轴平行射到抛物线
上,经过两次反射后经过
射出,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14bd426e7e1e65d91394da0b28d49f65.png)
________ ,光线从点
到
经过的总路程为________ .
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/5/853c5b83-fc2b-492e-873b-9c7170867603.png?resizew=100)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c1ba86ffc6e5542b62319848c14acaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a11db9cfc93cd1134b388ff5fbeea0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b0145ad62ecc8ae00569ef2bd4ac5ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14bd426e7e1e65d91394da0b28d49f65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/5/853c5b83-fc2b-492e-873b-9c7170867603.png?resizew=100)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/5/c7f6d403-b1a2-4dc9-af2e-5c3ddc166f66.png?resizew=193)
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5卷引用:江苏省泰州市五校2022-2023学年高二上学期期中联考模拟数学试题
江苏省泰州市五校2022-2023学年高二上学期期中联考模拟数学试题百师联盟2021届高三冲刺卷(三)新高考卷数学试题(已下线)专题05 平面解析几何-2021年高考真题和模拟题数学(文)分项汇编(全国通用)(已下线)专题25 圆锥曲线的光学性质及其应用 微点4 圆锥曲线的光学性质综合训练北京市大兴区2023-2024学年高二上学期期末检测数学试题
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2 . 如图,抛物线
的焦点为
,过点
作直线与抛物线交于
两点,过点
作抛物线准线的垂线,垂足为
,记
,则下列说法中:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/9/45b241f0-5c03-4479-a27d-29ff028f6071.png?resizew=151)
①
,
;
②点
在一条直线上;
③
;
④以线段
为直径的圆与
轴相切;
⑤分别过
两点作抛物线的切线,则两条切线互相垂直.
正确命题的个数为( )
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e3a1467ecf286e3cadaf5aa006606f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8be203d34608ed96c7e57c0bf6e9dbe6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/9/45b241f0-5c03-4479-a27d-29ff028f6071.png?resizew=151)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cfba8278d7d4e13681c828abda68df1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af529571cca0e6957a197fe3f878d419.png)
②点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c646e6fa1debff9ddd55015b538a8bd6.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81bc5a9ed738f259759e5f4e92ebc036.png)
④以线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
⑤分别过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
正确命题的个数为( )
A.![]() | B.![]() | C.![]() | D.![]() |
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3 . 抛物线C上任意一点
都满足
,则抛物线C的焦点到准线的距离为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee82283f06cedef32eb15b87964f5d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356c41875117680dda672cb6ed5a8a13.png)
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解题方法
4 . 下列结论判断正确的是( )
A.平面内与一个定点![]() ![]() |
B.方程![]() ![]() ![]() ![]() |
C.平面内到点![]() ![]() ![]() |
D.双曲线![]() ![]() ![]() ![]() ![]() ![]() ![]() |
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9卷引用:广西桂林市第十八中学2022-2023学年高二上学期期中考试数学试题
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5 . 下列四个命题中,假命题的是( )
A.要唯一确定抛物线,只需给出抛物线的准线和焦点 |
B.要唯一确定以坐标原点为中心的椭圆,只需给出一个焦点和椭圆的上一点 |
C.要唯一确定以坐标原点为中心的双曲线,只需给出双曲线上的两点 |
D.要唯一确定以坐标原点为中心的双曲线,只需给出一条渐近线方程和离心率 |
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解题方法
6 . 如图,已知点
是棱长为2的正方体
的底面
内(包含边界)一个动点,下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/13/9bb9554b-1d03-41ed-a909-00ec63dc5c3e.png?resizew=159)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/13/9bb9554b-1d03-41ed-a909-00ec63dc5c3e.png?resizew=159)
A.过![]() ![]() ![]() |
B.当点![]() ![]() ![]() ![]() ![]() ![]() |
C.若点![]() ![]() ![]() ![]() ![]() |
D.若点![]() ![]() ![]() ![]() ![]() ![]() |
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2022·全国·模拟预测
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7 . 已知抛物线
的焦点为
,抛物线
上的点
到点
的距离是2,
是抛物线
的准线与
轴的交点,
,
是抛物线
上两个不同的动点,
为坐标原点,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2a21beb3c88e85fd5891d3a98fdd9ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da8f3516cc8a990d8208a3946cca8eaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
A.![]() | B.若直线![]() ![]() ![]() |
C.若直线![]() ![]() ![]() | D.若直线![]() ![]() ![]() |
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7卷引用:江苏省南通市如皋市2022-2023学年高三上学期10月诊断调研测试数学试题
(已下线)江苏省南通市如皋市2022-2023学年高三上学期10月诊断调研测试数学试题(已下线)江苏省南通市如皋市2022-2023学年高三上学期期中模拟数学试题(已下线)2022年高考最后一卷(押题卷七)数学试题广东省广州市真光中学2023届高三上学期8月开学考试数学试题江苏省镇江市扬中高级中学2022-2023学年高二下学期3月阶段测试数学试题江苏省南京市中华中学2022-2023学年高二下学期3月学情检测数学试题新疆乌鲁木齐市第六十一中学2024届高三上学期12月月考数学试题
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8 . 如图,曲线
:
的焦点为
,直线
与曲线
相切于点
异于点
,且与
轴,
轴分别相交于点
,
,过点
且与
垂直的直线交
轴于点
,过点
作准线及
轴的垂线,垂足分别是
,
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10f4123c19136d3a4dc040dce8e34e14.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ac58049f0de1685e23303e188a2454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3904463e169fb25dbd36fa257edd2bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
A.当![]() ![]() ![]() ![]() |
B.无论点![]() ![]() ![]() ![]() |
C.无论点![]() ![]() ![]() |
D.无论点![]() ![]() ![]() |
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3卷引用:福建省福州第八中学2024届高三上学期期中考试数学试题
9 . 已知动点Q到直线
的距离比到定点
的距离大1.
(1)写出动点Q的轨迹C的方程;
(2)设
为过
作曲线C的任一条弦AB所在直线方程,弦AB的中点为D,过D点作直线DP与直线
交于点P,与x轴交于点M,且使得
,
,求
的正弦值(其中F为定点
).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639c3d2ff5ee566fcc1b69c65712a661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53a948d2f7732d7f03e986c63712089b.png)
(1)写出动点Q的轨迹C的方程;
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/303094682b317daea83be885d1c7ff4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53a948d2f7732d7f03e986c63712089b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6875d552e9fff3c7d655f3a59b166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d81529452eb2cb8578fd164db9e957ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d07eb844eaa3cd1580b86620d3c0c92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/519dd7206db5db9d788757c4e30840dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53a948d2f7732d7f03e986c63712089b.png)
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10 . 下列命题正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/28/6dac043e-3680-451e-b2be-5aa87018bb43.png?resizew=170)
A.已知圆![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
B.已知两圆![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
C.设圆![]() ![]() ![]() ![]() |
D.如图,斜线段![]() ![]() ![]() ![]() ![]() ![]() ![]() |
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