1 . 已知抛物线
的焦点为F,且焦点F到其准线的距离为
,A、B、C为抛物线上相异三点.
(1)求p的值;
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7089148c36cb3c39af71de653756396a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
(1)求p的值;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2433015c90b8180e71b558c4a26bdb93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eeb5389fc5b22cd1dbfa8d11264d877.png)
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解题方法
2 . 如图,
为抛物线
上的一点,抛物线的焦点为
,
垂直于直线
,垂足为
,直线
垂直于
,分别交
轴、
轴于点A,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/b37f1c46-9f29-45e8-8d5e-773b97f69821.png?resizew=177)
(1)求使
为等边三角形的点
的坐标.
(2)是否存在点
,使
平分线段
?若存在,求出点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aafae84e7fe39dc5b694c39405201d32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb70fdf064b9193e506ca43f4672af56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/b37f1c46-9f29-45e8-8d5e-773b97f69821.png?resizew=177)
(1)求使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0936e532862712045365cb3f63fced9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)是否存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
您最近一年使用:0次
2022-08-28更新
|
376次组卷
|
4卷引用:2023版 北师大版(2019) 选修第一册 名师精选卷 第八单元 抛物线 B卷
2023版 北师大版(2019) 选修第一册 名师精选卷 第八单元 抛物线 B卷2023版 苏教版(2019) 选修第一册 名师精选卷 第八单元 抛物线 B卷(已下线)第3章 圆锥曲线与方程(A卷·知识通关练)(2)(已下线)第13讲 抛物线(9大考点)(2)
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
解题方法
4 . 如图,已知
为二次函数
的图像上异于顶点的两个点,曲线
在点
处的切线相交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/14/b1c9ee20-7af4-4018-a49a-6703b2da8013.png?resizew=203)
(1)利用抛物线的定义证明:曲线
上的每一个点都在一条抛物线上,并指出这条抛物线的焦点坐标和准线方程;
(2)求证:
成等差数列,
成等比数列;
(3)设抛物线
焦点为
,过
作
垂直准线
,垂足为
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/031da5d48fbe63745429b1add253344f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c60b6eee6448a408616e1b61bd793f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf210c8c9e83e70f2d3ede1e18a5f3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/031da5d48fbe63745429b1add253344f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7775aa57ca0e62216f3039ed88dceed0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/14/b1c9ee20-7af4-4018-a49a-6703b2da8013.png?resizew=203)
(1)利用抛物线的定义证明:曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf210c8c9e83e70f2d3ede1e18a5f3d.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/297426b8f7938c8d14f42a481a19c3a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a2b440f7aac4b432fef8f4c9f8e3f76.png)
(3)设抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf210c8c9e83e70f2d3ede1e18a5f3d.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/35d58f9019097bd05037aefd5c322916.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31b7a8d232e9a11f5d471f47a1294cd4.png)
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5 . 已知抛物线
的焦点为F,过焦点F斜率为
的直线交抛物线于A、B两点(点A在第一象限),交抛物线准线于G,且满足
.
(1)求抛物线的标准方程;
(2)已知C,D为抛物线上的动点,且
,求证直线CD过定点P,并求出P点坐标;
(3)在(2)的条件下,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7089148c36cb3c39af71de653756396a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c6425b4f35e5558ac059e03425f9f61.png)
(1)求抛物线的标准方程;
(2)已知C,D为抛物线上的动点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a49bdf1dcfe6c344dd2442669e72c44b.png)
(3)在(2)的条件下,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe70626f544a8f74474cbcabdaa42f2c.png)
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解题方法
6 . 已知抛物线
上的点
与焦点
的距离为9,点
到
轴的距离为
.
(1)求抛物线
的方程.
(2)经过点
的直线与抛物线
交于
两点,
为直线
上任意一点,证明:直线
的斜率成等差数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e6c830bfa9a1b979a1a9665166424bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/647da112824baed1f2bbfff103b748e8.png)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)经过点
![](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/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6875d552e9fff3c7d655f3a59b166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69609f8e3507a61acc52be28597d2cc3.png)
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2022-05-25更新
|
2466次组卷
|
9卷引用:河北省部分名校2022届高三下学期5月联合模拟数学试题
7 . 已知抛物线
的焦点为F,点P在抛物线上,O为坐标原点,且
.
(1)抛物线E的标准方程;
(2)如图所示,过点
和点
分别作两条斜率为k的平行弦分别和抛物线E相交于点A,B和点C,D,得到一个梯形ABCD.记梯形两腰AD和BC的斜率分别为
和
,且
.
![](https://img.xkw.com/dksih/QBM/2022/5/17/2981554522841088/2982714736459776/STEM/902a180e-205e-4fce-835e-790f201c0a3d.png?resizew=142)
(i)试求实数k的值;
(ii)若存在实数
,使得
,试求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b527ec9f92467b8f24554a2a67ee987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c8392d5bdd018d13d60a803899fb74.png)
(1)抛物线E的标准方程;
(2)如图所示,过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/115f63c0df02147bb911a1c267576777.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee9b0cb76c47163d199a31bfa747cff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9972e1d4dfa4e311985876edccd70f3.png)
![](https://img.xkw.com/dksih/QBM/2022/5/17/2981554522841088/2982714736459776/STEM/902a180e-205e-4fce-835e-790f201c0a3d.png?resizew=142)
(i)试求实数k的值;
(ii)若存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8a532bd96f597e97531893ba3432b82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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8 . 设抛物线
的焦点为F,点
在抛物线C上,且满足
.
(1)求抛物线C的标准方程;
(2)过点
的两直线
的倾斜角互补,直线
与抛物线C交于A,B两点,直线
与抛物线C交于P.Q两点,
与
的面积相等,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e6c830bfa9a1b979a1a9665166424bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/186e3a011bcbdab045ae4a0208787dc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c382973a38078f05972fbbb5a6a3aa54.png)
(1)求抛物线C的标准方程;
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95ee9bca35a3a7945faba044950a09f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44434b647ec546fe787e2164e0be6cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eaceb8d6c6927e14d9ac7a557a2b11d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91a9bf6bda9363dbef5f6ff4bf6a5edf.png)
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解题方法
9 . 已知抛物线
上的点
到其准线的距离为5.不过原点的动直线交抛物线C于A,B两点,M是线段AB的中点,点M在准线l上的射影为N.
(1)求抛物线C的方程;
(2)当
时,求证:直线AB过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37ab7408ffcefcb8e5e1ad4a9c58f1b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15950ec348524d84c6eae6bb8d25a383.png)
(1)求抛物线C的方程;
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5095d644f94ff84431a617abfef9a65f.png)
您最近一年使用:0次
2022-05-07更新
|
782次组卷
|
4卷引用:陕西省西安市阎高蓝周临鄠六区2022届高三下学期三模文科数学试题
陕西省西安市阎高蓝周临鄠六区2022届高三下学期三模文科数学试题陕西省西安市阎高蓝周临鄠六区2022届高三下学期三模理科数学试题(已下线)第09讲 高考难点突破一:圆锥曲线的综合问题(定点问题) (精讲)-2(已下线)10.6 三定问题及最值(精讲)
名校
解题方法
10 . 若
,
为抛物线
的焦点,
为抛物线上任意一点,求
的最小值及取得最小值时的
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/643b31966f52a03f001f2e613cd701dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b072ff6d1b83232bebd7d4709ffba4ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/508734095955bb96d52f37be4e681700.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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