解题方法
1 . 抛物线
的焦点为F,准线为l,点P为抛物线上一点,
,垂足为A,若直线
的斜率为
,且
.
(1)求抛物线C的方程;
(2)若过F的直线与曲线C交于P,Q两点,直线
与直线
分别交于A,B两点,试判断以
为直径的圆是否经过定点?若是,求出定点坐标;若不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3764ba3aa0a241787f4661026bb14053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb50782b4a4f59f8798a90086b0d5c6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47153fdd73c0661fa460130082e30929.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860a14f793055cf05edc8037eeaff6d3.png)
(1)求抛物线C的方程;
(2)若过F的直线与曲线C交于P,Q两点,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/139c0ae68e597571ba72ef727fa9222c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
2020-12-26更新
|
477次组卷
|
4卷引用:安徽省皖南八校2020-2021学年高三上学期第二次联考数学(文)试题
名校
解题方法
2 . 已知抛物线C的顶点在坐标原点,准线方程为
,F为抛物线C的焦点,点P为直线
上任意一点,以P为圆心,PF为半径的圆与抛物线C的准线交于A、B两点,过A、B分别作准线的垂线交抛物线C于点D、E.
![](https://img.xkw.com/dksih/QBM/2021/4/17/2701825258119168/2705504178413568/STEM/347dd667b8ed41a3bd97f5933ee3f608.png?resizew=210)
(1)求抛物线C的方程;
(2)证明:直线DE过定点,并求出定点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2f3fa679bb55ded25a9b72a8e788cb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd8e2fa0e4383590afe6d8f1d7aa8bdc.png)
![](https://img.xkw.com/dksih/QBM/2021/4/17/2701825258119168/2705504178413568/STEM/347dd667b8ed41a3bd97f5933ee3f608.png?resizew=210)
(1)求抛物线C的方程;
(2)证明:直线DE过定点,并求出定点的坐标.
您最近一年使用:0次
2021-04-22更新
|
950次组卷
|
10卷引用:河南省许昌市、济源市、平顶山市2020届高三第三次联考数学(理)试题
河南省许昌市、济源市、平顶山市2020届高三第三次联考数学(理)试题河南省许昌市、济源市、平顶山市2020届高三数学(理科)第三次质检试题安徽省六安市第一中学2021届高三下学期适应性考试理科数学试题江苏省苏州市第十中学2020-2021学年高二上学期12月阶段检测数学试题(已下线)专题25 抛物线(解答题)-2021年高考数学(文)二轮复习热点题型精选精练(已下线)专题27 抛物线(解答题)-2021年高考数学(理)二轮复习热点题型精选精练(已下线)专题27 抛物线(解答题)-2021年高考数学二轮复习热点题型精选精练(新高考地区专用)(已下线)专题3.4《圆锥曲线的方程》单元测试卷(B卷提升篇)-2020-2021学年高二数学选择性必修第一册同步单元AB卷(新教材人教A版,浙江专用)(已下线)2021年高考数学押题预测卷01(浙江专用)(已下线)3.3.2 (整合练)抛物线的简单几何性质-2021-2022学年高二数学考点同步解读与训练(人教A版2019选择性必修第一册)
3 . 已知抛物线
的焦点为
,直线
与
交于
,
两点,与
的准线交于点
.
(1)若直线
经过点
,且
,求直线
的方程;
(2)设直线
,
的斜率分别为
,
,且
.
①证明:直线
经过定点,并求出定点的坐标;
②求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fa2c731aaa4005382d5b4324e29fbb0.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/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/ac047e91852b91af639feec23a9598b2.png)
(1)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00a10549809c4a8c4517dc01a71e2693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)设直线
![](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/985a294d39f2a106aa474462ec15dbfb.png)
①证明:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
②求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6356488b921e900ad8f0448d20e918e6.png)
您最近一年使用:0次
解题方法
4 . 已知抛物线
的焦点为
,过
且斜率为2的直线交抛物线于
两点,
.
(1)求抛物线
的方程;
(2)过点
的直线
与抛物线
相交于
两点,已知
,且以线段
为直径的圆与直线
的另一个交点为
,试问在
轴上是否存在一定点,使得直线
恒过此定点.若存在,请求出定点坐标,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e6c830bfa9a1b979a1a9665166424bf.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/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdc3db917597fbc33643072cd2f89a43.png)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/623afc24f2227004b0e1b3922dfb954b.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/79dbefeef8b858149bc3dcf7b2ebb133.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba53065eb180a682305fddb95d14b62f.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/7785afeeaf274892253d04b4f693b367.png)
您最近一年使用:0次
2020-09-06更新
|
391次组卷
|
5卷引用:安徽省怀远一中、蒙城一中、淮南一中、颍上一中、涡阳一中2020届高三5月五校联考数学理科试题
安徽省怀远一中、蒙城一中、淮南一中、颍上一中、涡阳一中2020届高三5月五校联考数学理科试题(已下线)专题25 抛物线(解答题)-2021年高考数学(文)二轮复习热点题型精选精练(已下线)专题27 抛物线(解答题)-2021年高考数学(理)二轮复习热点题型精选精练(已下线)专题27 抛物线(解答题)-2021年高考数学二轮复习热点题型精选精练(新高考地区专用)四川省成都市2023-2024学年高二上学期期末练习数学试题(2)
5 . 已知动点
到
的距离比它到x轴的距离大1,记P得轨迹为曲线
.
(1)求曲线
的方程;
(2)直线l与曲线
相交于A、B两点,与y轴交于点M,过A、B分别作曲线
的切线相交于点N,直线
、
分别与x轴相交于C、D.是否存在实数
,使得对于任意的直线l,都有
成立?若存在,求出
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8701e0cce437edc830438b4fe6277d89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5421a28dc3675ae20190d6090793246e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
(2)直线l与曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a11ad94853c7755727f10c56dd2bb90e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a11ad94853c7755727f10c56dd2bb90e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c023f4b501684abd869b36d6e6c7f21f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/279563c3c055777ce1aa369a2ef54aed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/210a79fecea047497266ce0895e23646.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
解题方法
6 . 已知曲线
上的任意一点
到定点
的距离比它到定直线
的距离少1.
(Ⅰ)求曲线
的方程.
(Ⅱ)已知
,过点
作直线
与曲线
交于
,
两点.求证:直线
,
关于
轴对称.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/092fd1b1d33979818300cd2e3699bff7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639c3d2ff5ee566fcc1b69c65712a661.png)
(Ⅰ)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(Ⅱ)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0929421a6188c3122442866b0b85a5e.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
您最近一年使用:0次
7 . 过抛物线
焦点
的直线
与抛物线交于
两点,与圆
交于
两点,(从下至上依次为
).若
,则直线
的斜率
为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.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/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e383fcc122f267043fbafe0972bfb900.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39acab3cfb59bfc9591371721ab01d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20490cf9cedbd19be05c3ede9d80f504.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a54a76d84dd826d11a1859c8ab7e521.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
2020-08-16更新
|
338次组卷
|
2卷引用:安徽省合肥七中、肥西农兴中学、合肥三十二中、合肥五中2020届高三下学期冲刺高考最后一卷数学(理)试题
8 . 如图,已知抛物线
,点
,过点
作直线
交
于
两点.
![](https://img.xkw.com/dksih/QBM/2020/8/10/2525089196507136/2528954881597440/STEM/4934e627a1f94618be3481d36ceb61fe.png?resizew=135)
(1)求证:
;
(2)当
时,求直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/782b5e0acc52492ea603566767f75455.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/096f6d51763e8fd733758e5b4ce26c1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://img.xkw.com/dksih/QBM/2020/8/10/2525089196507136/2528954881597440/STEM/4934e627a1f94618be3481d36ceb61fe.png?resizew=135)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a6371a9e62b43768187110d8882a485.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/404315609d66b203b16fd3f8549beb26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
您最近一年使用:0次
2020-08-16更新
|
391次组卷
|
2卷引用:安徽师范大学附属中学2020届高三下学期6月第九次模拟考试文科数学试题
解题方法
9 . 已知动圆
过点(2,0),被
轴截得的弦长为4.
(1)求圆心
的轨迹方程;
(2)若
的顶点在
的轨迹上,且
,
关于
轴对称,直线
经过点
,求证:直线
恒过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(1)求圆心
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2ba2238d6afe0187534155dd9ac48c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
2020-08-14更新
|
418次组卷
|
2卷引用:安徽省马鞍山市2020届高三第三次教学质量监测文科数学试题
解题方法
10 . 已知抛物线
上一点
,
到其焦点
的距离等于
.
(1)求抛物线
的标准方程;
(2)若不垂直于
轴的直线
交抛物线
于
,
两点,直线
与
的倾斜角互补,求证:直线
过定点,并求出该定点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df40ba57bb5819b4aaa38d514500052.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/595bbb8e0e2212bf572b88833cd07eeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbb554264d6838229cf2920a9bd99cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c6c7567972273b4ba733b47bf9d5408.png)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若不垂直于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a477603f3f88c3b48352b6130f9ad5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2319a01218514917e446dfc807a625ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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