1 . 如图,在平面直角坐标系xOy中,已知抛物线的焦点F在y轴上,其准线与双曲线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1138b79ac75624129b453178d7e47aa3.png)
的下准线重合.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/29/eec6a6bd-0479-4edf-adf2-4757a2068076.png?resizew=212)
(1)求抛物线的标准方程;
(2)设A(
,
)(
>0)是抛物线上一点,且AF=
,B是抛物线的准线与y轴的交点.过点A作抛物线的切线l,过点B作l的平行线l′,直线l′与抛物线交于点M,N,求△AMN的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1138b79ac75624129b453178d7e47aa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be721c5c143e0507b9380c52cf558a57.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/29/eec6a6bd-0479-4edf-adf2-4757a2068076.png?resizew=212)
(1)求抛物线的标准方程;
(2)设A(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8112f9185c7d48b015d9cd0525616b31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/533a7b702ada1dd80123e4041271d521.png)
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2 . 探照灯反射镜的纵断面是抛物线的一部分, 光源放在焦点F处.已知灯口直径为60cm,光源距灯口的深度为40cm,则光源到反射镜的顶点的距离为
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/67c4e507-d882-4771-9b92-05e1d58a6338.png?resizew=112)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/67c4e507-d882-4771-9b92-05e1d58a6338.png?resizew=112)
A.5cm | B.10cm | C.15cm | D.20cm |
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2020-01-29更新
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269次组卷
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3卷引用:江苏省南通市通州区、海安县2019-2020学年高二上学期期末数学试题
解题方法
3 . 在平面直角坐标系
中,曲线
上的动点
到点
的距离比到直线
的距离大1.
(1)求曲线
的方程;
(2)设过点
的动直线
与曲线
交于
两点,是否存实数
,使得
为定值?若存在,求出
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23bd5e56960c7d9ea406a60df2f75f82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63309dbc3612815f6dbdee23d9a10adc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6875d552e9fff3c7d655f3a59b166.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48c49504c72ca14f65864ee3cac50326.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/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9002e84af00c9d8f0358a738a34510c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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4 . 已知抛物线
的焦点为
,其准线
与
轴交于点
,若抛物线上一点
满足
,则实数
的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8516f71467b419293fa27df70bdaed74.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3129f8b74b3e828a19d1ec4a017ceeb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b5ba5c3311ccd7f0638035533d9c134.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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5 . 已知抛物线的准线方程为
,则该抛物线的标准方程为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eefa44964db83759aff6fc8dd7ef8f28.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-03-29更新
|
198次组卷
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3卷引用:江苏省南通市2019-2020学年高二上学期教学质量调研(二)数学试题
名校
6 . 已知抛物线C的顶点是双曲线
的中心,而焦点是双曲线的右顶点
(1)求抛物线C的方程;
(2)若直线
与抛物线相交于A、B两点,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f11a4314f30e0a5a7cfb2e290751fec.png)
(1)求抛物线C的方程;
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33400b08941f4f9c0ed12b0e0cdff822.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3825ccc273ef9a672a606432d165b866.png)
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名校
7 . 如图是抛物线形拱桥,当拱顶离水面2米时,水面宽4米.则水位上涨1米后,水面宽 为______ 米.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/1e41de14-4789-49c2-84de-aefd917f5597.png?resizew=164)
您最近一年使用:0次
2020-03-25更新
|
272次组卷
|
2卷引用:江苏省南通市海门中学2019-2020学年高二上学期期中数学试题
名校
解题方法
8 . 已知双曲线
(
,
)的一条渐近线方程为
,点
在双曲线上;抛物线
(
)的焦点F与双曲线的右焦点重合.
(1)求双曲线和抛物线的标准方程;
(2)过焦点F作一条直线l交抛物线于A,B两点,当直线l的斜率为
时,求线段
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f3fa0b40fb0d9b8c62e37316ab3b04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21d532ce76942846df88c6f66112e50f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cef4c01e240c731837600b3dff470b15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fc58c62444bf42a25289c45425a00f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5abd313d4e92a762fb7fb0c1cb65263d.png)
(1)求双曲线和抛物线的标准方程;
(2)过焦点F作一条直线l交抛物线于A,B两点,当直线l的斜率为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
2020-03-25更新
|
291次组卷
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3卷引用:江苏省南通市海门中学2019-2020学年高二上学期期中数学试题
名校
9 . 在平面直角坐标系
中,已知抛物线
的焦点为
,点
为抛物线的准线上一点,点
为线段
与抛物线的交点,定义:
.
(1)若点
的纵坐标为1,求
的值;
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](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/3aa124b5b80c34f7b78ba092b0cba381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/963111aff6952322dfaca75ae069873c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc634d513b1e5fce3d750339bd9366b.png)
(1)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff8f3cfb2d0a992640ecc54f7ec47567.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c71d1b03e88af5efb1d9661b63420e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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2019·江苏南通·一模
名校
10 . 在平面直角坐标系
中,已知定点
,点
在
轴上运动,点
在
轴上运动,点
为坐标平面内的动点,且满足
,
.
(1)求动点
的轨迹
的方程;
(2)过曲线
第一象限上一点
(其中
)作切线交直线
于点
,连结
并延长交直线
于点
,求当
面积取最小值时切点
的横坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7795aec93c2c7ac2fd93e6747ca6516c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/092fd1b1d33979818300cd2e3699bff7.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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53e48f79069ada435c8225a124f149c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa3da6f509c1fd6041f2fa0d00a29ce.png)
(1)求动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b79ca81f286d8aeed52f91ee13ce0d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75f702bfe1a376398286f1dc3daf8c67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6875d552e9fff3c7d655f3a59b166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a75af77f184b8d76a881874298852081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6875d552e9fff3c7d655f3a59b166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56844fb3f989204b45c68d8751a1e6e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
您最近一年使用:0次
2020-02-23更新
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543次组卷
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4卷引用:【市级联考】江苏省如皋市2019届高三教学质量调研(三)数学试题
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