1 . 设经过点
的直线
与抛物线
相交于
、
两点,经过点
的直线
与抛物线
相切于点
.
(1)当
时,求
的取值范围;
(2)问是否存在直线
,
使得
成立,若存在,求出
的取值范围;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eaab33674c9b584eca56567a338ecc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b108ab31cc093f03cf48ad65429889e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cca32bc15aa06392a08df5c601217ce.png)
(2)问是否存在直线
![](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/8272300b301eeb34dffeeca9ac94f1d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2 . 如图,P是抛物线
上一点,直线l过点P且与抛物线C交于另一点Q.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/2473fbcb-e081-43b4-81d0-82e758ac4db5.png?resizew=291)
(1)若直线l与过点P的切线垂直,求线段PQ中点M的轨迹方程;
(2)若直线l不过原点且与x轴交于点S,与y轴交于点T,试求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/496e5f255a3778112eaedee8e06c6e70.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/2473fbcb-e081-43b4-81d0-82e758ac4db5.png?resizew=291)
(1)若直线l与过点P的切线垂直,求线段PQ中点M的轨迹方程;
(2)若直线l不过原点且与x轴交于点S,与y轴交于点T,试求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c406dbe21c9d93c1c71e2bc6170583e.png)
您最近一年使用:0次
2020-04-12更新
|
907次组卷
|
2卷引用:浙江省台州市黄岩中学2019-2020学年高三下学期4月线上考试数学试题
名校
解题方法
3 . 如图,
为
正半轴上一点.第一象限内两点
在抛物线
上,满足
,记
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/9fcbc248-d6bc-4040-8ca4-1a7f8c3d4e11.png?resizew=105)
(1)若
,
,求
的值;
(2)若存在
,使得
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fe4b59c2f40deafebe46420af82cf03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44219ac054ff2ae2ca914812df8351b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5d8abc12096bc7ae617b30eeb8f9714.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43894fdea9ac0534664e9adb20c4ff91.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/9fcbc248-d6bc-4040-8ca4-1a7f8c3d4e11.png?resizew=105)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7787c9d99f4cf298faff700ed9b55c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e69866076dcff686a05e9e91e61e68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53502463cc76201000e02df314e58769.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5095a28bb1b91bf6bed9e2cfbd76bb18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
解题方法
4 . 若
是抛物线
上的点,过点
作射线
,交圆
于
,
两点,且
,则
的取值范围是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7775aa57ca0e62216f3039ed88dceed0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac8a3bffe545af2299cf999d44767206.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30ba9c33e5121eb5f894ede0c832803a.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/cc4bb395326bf13324d3531bb3d6386f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://img.xkw.com/dksih/QBM/2020/6/8/2480253097385984/2480779073060864/STEM/004c2591c04e4eb7ae5432e031684c72.png?resizew=223)
您最近一年使用:0次
名校
解题方法
5 . 已知抛物线
,过抛物线的焦点
且与
轴垂直的直线与抛物线在第一象限交于点
,
的面积为
,其中
为坐标原点.
(1)求抛物线的标准方程;
(2)若
,
,
为抛物线上的两个不同的点,直线
,
的斜率分别为
,
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/631420012fbfa85b657de26ae09acc11.png)
,求点
到直线
的距离的取值范围.
![](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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8c3b743769d19231c2165ec275bab1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(1)求抛物线的标准方程;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68cb0619c5316a4bd0daee96bbc05f94.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/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.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/631420012fbfa85b657de26ae09acc11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23d99ded0ecd73c3ecc484f1e33c714b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
2020-05-28更新
|
188次组卷
|
2卷引用:2019届浙江省台州市三区三校高三下学期5月高考适应性考试数学试题
6 . 设抛物线
,点
是抛物线的焦点,点
在
轴正半轴上(异于
点),动点
在抛物线上,若
是锐角,则
的范围为__________ .
![](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/56dba6ef0c00b3442464e6d0f39cf5c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5910d901f5f4f258610baa540757af30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2020-01-28更新
|
1325次组卷
|
5卷引用:浙江省温州市2019-2020学年高二上学期期末数学试题
浙江省温州市2019-2020学年高二上学期期末数学试题(已下线)必刷卷07-2020年高考数学必刷试卷(新高考)【学科网名师堂】-《2020年新高考政策解读与配套资源》(已下线)卷07-2020年高考数学冲刺逆袭必备卷(山东、海南专用)【学科网名师堂】湖南省益阳市六校2022-2023学年高二上学期期末联考数学试题(已下线)专题20 抛物线的焦点弦问题
7 . 过
轴上动点
引抛物线
的两条切线
,
,其中
,
为切线.
(1)若切线
,
的斜率分别为
和
,求证:
为定值,并求出定值;
(2)当
最小时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c240561788bc63f41a6703219fb66d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a498dc93f63f98990b8f63990d4fe2e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
(1)若切线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.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/d7d65bc2ec06351b85b54f54b7f15082.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2db8663fab03f60f4ba1cf9b7e05e6d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/879b44e9ef1312eec33f07f636e810f9.png)
您最近一年使用:0次
解题方法
8 . 已知抛物线
:
(
)上横坐标为3的点与抛物线焦点的距离为4.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/25/1b9805d1-1236-46ec-ae51-f491afcc3284.png?resizew=253)
(1)求p的值;
(2)设
(
)为抛物线
上的动点,过P作圆
的两条切线分别与y轴交于A、B两点.求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fc58c62444bf42a25289c45425a00f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5abd313d4e92a762fb7fb0c1cb65263d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/25/1b9805d1-1236-46ec-ae51-f491afcc3284.png?resizew=253)
(1)求p的值;
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7775aa57ca0e62216f3039ed88dceed0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eb1887233d1594ce1bc2997a7405b1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d30337ed2f68b73a050688566eac4e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4dfec890cdfdda355e19463f3be813.png)
您最近一年使用:0次
2020-04-24更新
|
255次组卷
|
2卷引用:2019届浙江省宁波市高三下学期4月二模数学试题
名校
9 . 已知曲线
和曲线
交于A,B两点(点A在第二象限).过A作斜率为
的直线
交曲线M于点C(不同于点A),过点
作斜率为
的直线
交曲线
于E,F两点,且
.
![](https://img.xkw.com/dksih/QBM/2020/4/20/2445374506565632/2445660922183680/STEM/855914c060d24856aad3cb9d32b82bd1.png?resizew=146)
(I)求
的取值范围;
(Ⅱ)设
的面积为S,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3550ed39b1a95009cc330c5b7a7ef7cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7181e6fb9cbb4d4c3931e813110cce06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dbcf0320d94734aedd3d4e2e31b9827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/700458c01a7ad031e27d80ed43e9e882.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ec7bcf5820dfe70290259c2d7ac1ea5.png)
![](https://img.xkw.com/dksih/QBM/2020/4/20/2445374506565632/2445660922183680/STEM/855914c060d24856aad3cb9d32b82bd1.png?resizew=146)
(I)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
(Ⅱ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2ea13010e2399194be2a681310543e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1a673995c42de92069518cdea5bff50.png)
您最近一年使用:0次
2020-04-20更新
|
245次组卷
|
3卷引用:浙江省绍兴、嵊州2018-2019学年高三下学期第二次教学质量调测数学试题
解题方法
10 . 已知点
为抛物线
上异于原点
的任意一点,
为抛物线的焦点,连接
并延长交抛物线
于点
,点
关于
轴的对称点为
.
(1)证明:直线
恒过定点;
(2)如果
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb4dd4670828f75bc573b52cdd02e1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/907d5147cea4c9ce855074864fe54506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(1)证明:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66a5b7813e902306477f91f9f4084cd.png)
(2)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dede3ca92d36de07eab877a0fe43b6bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次