解题方法
1 . 已知圆O:
.
(1)求证:过圆O上点
的切线方程为
.类比前面的结论,写出过椭圆C:
上一点
的切线方程(不用证明).
(2)已知椭圆C:
,Q为直线
上任一点,过点Q作椭圆C的切线,切点分别为A、B,利用(1)的结论,求证:直线AB恒过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1410414ebd007a6aebfb75240e2b458f.png)
(1)求证:过圆O上点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22962a2ad892cb6b14ab039a06e8cdc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d340bd3f078b9261238d4fe59f1473c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/128aa322f3e76e8f03a7402bb2b2ae25.png)
(2)已知椭圆C:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cae00bdc6f8b564b6b15b32572c848b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
您最近一年使用:0次
2022-02-27更新
|
510次组卷
|
4卷引用:河南省南阳市2021-2022学年高三上学期期末数学(理科)试题
河南省南阳市2021-2022学年高三上学期期末数学(理科)试题河南省南阳市2021-2022学年高三上学期期末数学(理)试题(已下线)技巧04 解答题解法与技巧(练)--第二篇 解题技巧篇-《2022年高考数学二轮复习讲练测(新高考·全国卷)》(已下线)专题36 切线与切点弦问题
2 . 已知椭圆
的右焦点为
,离心率
.
(1)若
为椭圆
上一动点,证明
到
的距离与
到直线
的距离之比为定值,并求出该定值;
(2)设
,过定点
且斜率为
的直线
与椭圆
交于
两点,在
轴上是否存在一点
,使得
轴始终平分
?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/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24550b13dbecf7d86c7054250e987274.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5c7316976a221c051a2c14df80b1347.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fa5d6092f598c7da4796f965e40525a.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4580cc037c0c760c728cdbb74a8154c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5c0b4bf88663b0463f282a9550c1afb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.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/7789a500686c7a73770404ead6af0590.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dc94d2886db80a11b81b71f9a6d1d7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
您最近一年使用:0次
名校
解题方法
3 . 在平面直角坐标系
中,已知椭圆
的左、右顶点分别为
,
,上顶点为
,
的面积为2,点
满足
.
(1)求椭圆
的标准方程;
(2)过点
且斜率不为0的直线
与椭圆
自左向右依次交于
,
两点,
为线段
上一点,且
,设直线
与直线
的斜率分别为
,
,求证:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73314082aec86935318f5efc466b1dce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ad3a4d8eb0a4f3dd417124a19f60066.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cac53faaef7d8aa9d0f2ce5b5b2de3f.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9380745f15c3512d199a522eff36761.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84fb85c78522640bcaf889f89ad89de9.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/a2a3f348a942d468f0d77c0dfbb41d87.png)
您最近一年使用:0次
2022-12-27更新
|
112次组卷
|
2卷引用:河南省湘豫名校联考2022-2023学年高三上学期12月期末摸底考试数学(文科)试题
名校
解题方法
4 . 已知椭圆
上有点
,左、右焦点分别为
.
(1)求椭圆的标准方程;
(2)若点Q为椭圆的上顶点,椭圆上有异于Q的两点
满足
,求证:直线
恒过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfc2210a7e09298897f6585ad08a70d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f49644cd9fa4688cc3a74a234952530.png)
(1)求椭圆的标准方程;
(2)若点Q为椭圆的上顶点,椭圆上有异于Q的两点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0615bfe416db14d15783f764613ae84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
您最近一年使用:0次
2022-12-06更新
|
778次组卷
|
8卷引用:河南省青桐鸣2023届高二上学期11月联考数学试题
解题方法
5 . 已知抛物线
上一点
的横坐标为4,且
到焦点
的距离为5,直线
交抛物线于
,
两点(位于对称轴异侧),
为坐标原点,且
.
(1)求抛物线的方程;
(2)求证:直线
必过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7089148c36cb3c39af71de653756396a.png)
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5175325801a61d53b0c7d776afd2e2d0.png)
(1)求抛物线的方程;
(2)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
您最近一年使用:0次
2023-03-18更新
|
338次组卷
|
3卷引用:河南省省直辖县级行政单位济源市2022-2023学年高二上学期期末数学理科试题
解题方法
6 . 已知点P在椭圆C:
上.
(1)P与椭圆的顶点不重合,过P作圆
的两条切线,切点分别为E,F,直线EF与x轴、y轴分别交于点M,N.求证:
为定值;
(2)若
,过P的两条直线交C于A,B两点,两直线PA,PB的斜率之和为0,求直线AB的斜率.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ddab7b8aa22e1ba4c59da7dc04ac9e2.png)
(1)P与椭圆的顶点不重合,过P作圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f5d967ad135991b6075ee45df55643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de7abc1c27897e27c4e3086f2bb6d8f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26454b354884f8b9d63910d5dc72e1cc.png)
您最近一年使用:0次
7 . 已知双曲线
经过点
,离心率是
.
(1)求双曲线
的方程;
(2)在双曲线
上任取两点
,满足
,过
作
于
,求证:存在定点
,使
是定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bf4fd84818abac17a9d21237ac5ce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6c09b41032e4722c412c2e2427500a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
(1)求双曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)在双曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70e8b17a7840ae7b75590da92fa0965b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5321357b220289ac13e88365af771743.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/084cf5ffced059f5653ee2a1023518b7.png)
您最近一年使用:0次
解题方法
8 . 已知椭圆
的左、右焦点分别为
,
,离心率为
,点M是C上任意一点,且
的周长为
.
(1)求椭圆C的方程;
(2)点P是椭圆C上一点且在第四象限,
,过点P作倾斜角互补的两条不同直线分别与椭圆C交于点A,B(A,B与P不重合),试判断直线
的斜率是否为定值,并证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b42fc33bcfc63ec2f4940ccd3f862400.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b43432af566fe0b3a5ee6a8eb9cb95a.png)
(1)求椭圆C的方程;
(2)点P是椭圆C上一点且在第四象限,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2dfb22c6f1c155747100e7536cd1abd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
2023-02-24更新
|
259次组卷
|
3卷引用:河南省商开大联考2022-2023学年高二上学期期末考试数学试题
解题方法
9 . 已知椭圆
的离心率
,且经过点
.
(1)求C的方程;
(2)直线
交椭圆C于P,Q两点,点P,E关于原点对称,若直线ME与MQ的斜率分别为
,
,求证:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5de85df85401e7e8da683ea4a784963c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86b85acb5a868b0ff2a17b1ca926dd43.png)
(1)求C的方程;
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ff33c080c560fccd8d9bf3b08a2886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d37ca2bbaa102db55f920aa0bc5ad0f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/498d92fc9cbc71d623104bae063133dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35bffbcbb953bc85c121c31c0b56401e.png)
您最近一年使用:0次
2022-07-03更新
|
353次组卷
|
2卷引用:河南省平顶山市2021-2022学年高二下学期期末数学文科试题
名校
解题方法
10 . 已知函数
,其中m>0,f '(x)为f(x)的导函数,设
,且
恒成立.
(1)求m的取值范围;
(2)设函数f(x)的零点为x0,函数f '(x)的极小值点为x1,求证:x0>x1.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e8933a880706fcda9f170b885a8fcc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5cc7268e5e034154c113d303fb5e842.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/474bedf25ad7450cd0e0b47045fb2d32.png)
(1)求m的取值范围;
(2)设函数f(x)的零点为x0,函数f '(x)的极小值点为x1,求证:x0>x1.
您最近一年使用:0次
2022-06-15更新
|
875次组卷
|
11卷引用:河南省信阳高级中学2021-2022学年高二下学期期末考试数学(理科)试题
河南省信阳高级中学2021-2022学年高二下学期期末考试数学(理科)试题江苏省无锡市江阴市2022届高三下学期最后一卷数学试题四川省成都市石室中学2021-2022学年高二下学期零诊模拟练习文科数学试题2020届山东省滨州市高三上学期期末考试数学试题2020届山东省青岛市胶州一中高三线上模拟试题(已下线)2020年秋季高三数学开学摸底考试卷(新高考)05(已下线)黄金卷01 【赢在高考·黄金20卷】备战2021年高考数学全真模拟卷(广东专用)江苏省园三2020-2021学年高二下学期3月月考数学试题江苏省苏州工业园区星海实验中学2020-2021学年高二下学期期中数学试题江苏省苏高中2022届高三上学期9月期初考试数学试题(已下线)考向16 利用导数研究函数的极值与最值(重点)