解题方法
1 . 已知过点
的动直线与抛物线
交于点
,抛物线
的焦点为
,当点
横坐标为
时,
.
(1)求抛物线
的方程;
(2)当直线
变动时,
轴上是否存在点
,使得点
到直线
的距离相等,若存在,求出点
坐标;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d56ab70e602f2e2e291df643ab209162.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e6c830bfa9a1b979a1a9665166424bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/a4b8503f4706b8321e4e79a87eadea84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5ba3a6326dc83632fa772c1d34cbff9.png)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)当直线
![](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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec56d586906ebaaa3c32c85a415f4c69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
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解题方法
2 . 已知点F为抛物线
的焦点,点
在抛物线上,且
.
(1)求该抛物线的方程;
(2)若点A在第一象限,且抛物线在点A处的切线交y轴于点M,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8516f71467b419293fa27df70bdaed74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a25877cc9e2856ebaf5d9f1e118d72a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d609cb7f8b4d79e8b65c0b8a0672d240.png)
(1)求该抛物线的方程;
(2)若点A在第一象限,且抛物线在点A处的切线交y轴于点M,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/323eb2e41f461ac655012a986d5a27bb.png)
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2022-04-02更新
|
200次组卷
|
2卷引用:河北省邢台市卓越联盟2021-2022学年高二下学期第一次月考数学试题
3 . 如图,已知抛物线
上一点
到焦点
的距离为3,直线
与抛物线交于
两点,且
(
为坐标原点),记
,
的面积分别为
.
![](https://img.xkw.com/dksih/QBM/2022/8/13/3043495117365248/3044256536961024/STEM/20b9f1036966437d8fa7c4de5be4268f.png?resizew=167)
(1)求抛物线的方程;
(2)求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3764ba3aa0a241787f4661026bb14053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c3e95e0f93a9bcd63c807c3229b9606.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/cec3f0349a972389b6b799a2f10c76ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f9d663d24fe7a38c2dabd7a627459e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/004104bafb5f30338123d4ea2b7fedde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e55b85a1dc91ee8a026ad44e82d42b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3637753af5ce86be9c23a9beb6b5067.png)
![](https://img.xkw.com/dksih/QBM/2022/8/13/3043495117365248/3044256536961024/STEM/20b9f1036966437d8fa7c4de5be4268f.png?resizew=167)
(1)求抛物线的方程;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4c21cbb1c2bcbcb8391ac5a879f2ae0.png)
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名校
4 . 已知抛物线C:
的焦点为F,点A(1,t)在抛物线上,且|AF|=2;
(1)求抛物线C的标准方程;
(2)若t>0,点P在抛物线C的准线l上,且三角形PAF为等腰三角形,求P点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3764ba3aa0a241787f4661026bb14053.png)
(1)求抛物线C的标准方程;
(2)若t>0,点P在抛物线C的准线l上,且三角形PAF为等腰三角形,求P点的坐标.
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5 . 设O为坐标原点,以曲线
上任意一点M为圆心作圆M,圆M与y轴交于C,D两点,若圆M过点
时,
.
(1)求曲线
的方程;
(2)若圆M与直线
相切,设圆M与圆
相交于A,B两点,若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94469fd19f40116e2dec334919d6586.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4b2bb30137f92479d11827ee769f001.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c914d89dabcbf9a371de7df792697f3.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94469fd19f40116e2dec334919d6586.png)
(2)若圆M与直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b556b1a9944719cf423e90f8df16c773.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79382ba44ba669b5d43fdd5427adf16c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/876921803b89720587d6c2320c2b5082.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/beeddea97a422e65d8670f212c5dde92.png)
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解题方法
6 . 在水平桌面上放一只内壁光滑的玻璃水杯,已知水杯内壁为抛物面型(抛物面指抛物线绕其对称轴旋转
所得到的面),抛物面的轴截面是如图所示的抛物线.现有一些长短不一、质地均匀的细直金属棒,其长度均不小于抛物线通径的长度(通径是过抛物线焦点,且与抛物线的对称轴垂直的直线被抛物线截得的弦),若将这些细直金属棒,随意丢入该水杯中,实验发现:当细棒重心最低时,达到静止状态,此时细棒交汇于一点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/b65dbcb7-dc60-447f-9218-3d0e46d8e8dd.png?resizew=281)
(1)请结合你学过的数学知识,猜想细棒交汇点的位置;
(2)以玻璃水杯内壁轴截面的抛物线顶点为原点,建立如图所示直角坐标系.设玻璃水杯内壁轴截面的抛物线方程为
,将细直金属棒视为抛物线的弦
,且弦
长度为
,以细直金属棒的中点为其重心,请从数学角度解释上述实验现象.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54e7a123c9cc0e058db28841fb0edcf3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/b65dbcb7-dc60-447f-9218-3d0e46d8e8dd.png?resizew=281)
(1)请结合你学过的数学知识,猜想细棒交汇点的位置;
(2)以玻璃水杯内壁轴截面的抛物线顶点为原点,建立如图所示直角坐标系.设玻璃水杯内壁轴截面的抛物线方程为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b35f0b940c8422ef47edc3b7ce55e47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d73879aefd41beb91cc808904276b1d.png)
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7 . 已知抛物线
的焦点为F,点
在E上.
(1)求
;
(2)O为坐标原点,E上两点A、B处的切线交于点P,P在直线
上,PA、PB分别交x轴于M、N两点,记
和
的面积分别为
和
.试探究:
是否为定值?若是定值,求出该定值;若不是定值,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d939b804513036cd96fddce791ece09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/680c76019f0ca3763cb230f461028d2c.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c63f99c1d614a7b240d0f86cac3a207.png)
(2)O为坐标原点,E上两点A、B处的切线交于点P,P在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd24f3c4bc9f9a75d4b28630bb630d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ed4c4e8edbd179f3fc38a6653f18c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/235f0a6fb218d28383e6f27f2df1f50f.png)
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2022-03-29更新
|
845次组卷
|
3卷引用:云南省昆明市2022届高三”三诊一模“复习教学质量检测数学(理)试题
名校
解题方法
8 . 已知抛物线C:
(
)的焦点为F,M(4,
)是抛物线C上的点,O为坐标原点,
.
(1)求抛物线C的方程;
(2)P(a,b)(
)为抛物线C上一点,过点P的直线l与圆
相切,这样的直线l有两条,它们分别交该抛物线C于A,B(异于点P)两点.若直线l的方程为
,当|PA|=|PB|时,求实数a的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fc58c62444bf42a25289c45425a00f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5abd313d4e92a762fb7fb0c1cb65263d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8112f9185c7d48b015d9cd0525616b31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab826e5dba4854d435173bd15686dbb0.png)
(1)求抛物线C的方程;
(2)P(a,b)(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/837fbc4862ae7c699199535d991234a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa39eb393bbb2e84915d8202d9b52f9e.png)
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2022-03-25更新
|
637次组卷
|
4卷引用:湖南省三湘名校教育联盟2022届高三下学期3月大联考数学试题
名校
解题方法
9 . 设抛物线
的焦点为
,点
在抛物线上,且
,椭圆
右焦点也为
,离心率为
.
(1)求抛物线方程和椭圆方程;
(2)若不经过
的直线与抛物线交于
、
两点,且
(
为坐标原点),直线与椭圆交于
、
两点,求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3764ba3aa0a241787f4661026bb14053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6137b68034469d66c48e923459c8f492.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/532bcbe8307e6b2129bdcdbd553ee5f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(1)求抛物线方程和椭圆方程;
(2)若不经过
![](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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ebac01772fba6b0eb3fbf14472a7f11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/5df7626240940eb340420a605e95aeee.png)
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2022-03-24更新
|
414次组卷
|
2卷引用:河北省石家庄市2021-2022学年高二上学期期末数学试题
10 . 在平面直角坐标系
中,圆
外的点
在
轴的右侧运动,且
到圆
上的点的最小距离等于它到
轴的距离,记
的轨迹为
.
(1)求
的方程;
(2)过点
的直线交
于
,
两点,以
为直径的圆
与平行于
轴的直线相切于点
,线段
交
于点
,证明:
是
的中点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1b2ffdcc66148aedaa575dde03d144e.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)过点
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
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