1 . 已知椭圆
的左,右焦点分别为
,
,且
,
与短轴的一个端点
构成一个等腰直角三角形,点
在椭圆
上,过点
作互相垂直且与
轴不重合的两直线
,
分别交椭圆
于
、
、
、
,且
,
分别是弦
,
的中点.
(1)求椭圆的方程.
(2)求证:直线
过定点
.
(3)求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a200ca2c4af794f4d1c6a5443830b5f.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/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7401bce743d857c2f89f49dfe434769f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(1)求椭圆的方程.
(2)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7c4a24f495043f334f403fd1f7d34d2.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5585a42c8f07ad90b94ace9db3d78994.png)
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2020-12-11更新
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593次组卷
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6卷引用:四川省成都市武侯区第十二中学2020-2021学年高二上学期期中数学理科试题
名校
解题方法
2 . 已知函数
,(
是自然对数的底数).
(1)求
在点
处的切线方程;
(2)若函数
,证明:
有极大值
,且满足
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68b100ea6efff74c80bbfedbeae2d39d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bea9227dd0104da58e0c40952cc87ed.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30cc61bb63769c2c98b58e53d646bb79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61c388166862b3ccfcc7ca749ebe5949.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/925ae2971c4890f9403e77eb8f277bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a486a1bfbc42031527534982e061f986.png)
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2020-10-16更新
|
240次组卷
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2卷引用:四川省绵阳南山中学实验学校2019-2020学年高三10月月考数学(文)试题
名校
3 . 如图,等腰梯形ABCD中,
,
,
,E为CD中点,以AE为折痕把
折起,使点D到达点P的位置(
平面ABCE)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/4e090173-33b0-4158-83ae-80767ab09d06.png?resizew=369)
(1)证明:
;
(2)若线段PC的长为
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/834aaab45e1c8eab84e8da1fec705952.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6c72495428bbbd12cad3271b0654ee2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/4e090173-33b0-4158-83ae-80767ab09d06.png?resizew=369)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbfbaf73297240eb116f22489519895a.png)
(2)若线段PC的长为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e483f50a009f2f66b269528e213756e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d2ed7474932ac3959108f2b835acf98.png)
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2020-09-14更新
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831次组卷
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3卷引用:四川省南充高级中学2020-2021学年高三上学期第二次月考理科数学试题
四川省南充高级中学2020-2021学年高三上学期第二次月考理科数学试题湖南省衡阳市第一中学2020-2021学年高三上学期第一次月考数学试题(已下线)第36讲 空间向量的应用-2021年新高考数学一轮专题复习(新高考专版)
2020高三·全国·专题练习
4 . 已知椭圆C:
的右焦点
,长半轴的长与短半轴的长的比值为2.
(1)求椭圆C的标准方程;
(2)设不经过点
的直线l与椭圆C相交于不同的两点M,N,若点B在以线段MN为直径的圆上,证明直线l过定点,并求出该定点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ce176fdfbb44b8459f441a8d805013f.png)
(1)求椭圆C的标准方程;
(2)设不经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81b54b9cf95418bc3dce6e4c698b9907.png)
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解题方法
5 . 已知函数
.
(1)若
在
上是单调函数,求a的取值范围;
(2)证明:当
时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b0b4fce1edf5fff5e17d6d8b5fb8aed.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51b6bec0e5c57dc0c97d2581012d2c55.png)
(2)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87f6ab8f310c2a608efd36a46150e6f5.png)
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2020-12-13更新
|
293次组卷
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2卷引用:贵州省黔东南州黎平县黎平三中2019-2020学年高二下学期期末考试数学(理)试题
名校
解题方法
6 . 已知函数
,满足:①对任意
,都有
;
②对任意
都有
.
(1)试证明:
为
上的单调增函数;
(2)求
;
(3)令
,试证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/604c3ed013411e9434f9b09044231465.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d2c2b34f9a5a85e9e2d4057b3c10130.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cf6a72e9fa5c736a96163d1628cebb6.png)
②对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/407169706c508bfae5d039639b49477d.png)
(1)试证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfd62e0e1189886f90e0c5bc126f64a4.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6cf16d7b4f5f2f8d6a1fe2d8a59538b.png)
(3)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b2f851b643e3a77682f0196dcf3e797.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18fe881244327001ef94b611e6b159db.png)
您最近一年使用:0次
2020高三·全国·专题练习
7 . 如图,椭圆
的右焦点为
,过焦点
,斜率为
的直线
交椭圆于
、
两点(异于长轴端点),
是直线
上的动点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/105a0d12-bdb9-4ff7-b30f-bc538d7de59b.png?resizew=184)
(1)若直线
平分线段
,求证:
.
(2)若直线
的斜率
,直线
、
、
的斜率成等差数列,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cae00bdc6f8b564b6b15b32572c848b.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/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.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/db8c3200c70d2d5ac8dabc9ca526ee27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/105a0d12-bdb9-4ff7-b30f-bc538d7de59b.png?resizew=184)
(1)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f0009063fe00277645aff1be6e32471.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac3e18162e6aecb99cacaef86d50efd4.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4f9b8cf2fa888e8d331ea4a446c0ace.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2dca049735b45fb9b2533c68605eddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f0009063fe00277645aff1be6e32471.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3171b3d11c6f4619e189677345357508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
2020-08-18更新
|
286次组卷
|
3卷引用:四川省泸州市泸县第二中学2020-2021学年高三上学期开学考试数学(理)试题
四川省泸州市泸县第二中学2020-2021学年高三上学期开学考试数学(理)试题四川省泸州市泸县第二中学2020-2021学年高三上学期开学考试数学(文)试题(已下线)专题21 圆锥曲线综合-2020年高考数学(文)母题题源解密(全国Ⅲ专版)
名校
8 . 已知函数
.
(1)求函数
的图象在
处的切线方程;
(2)求证:当
时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84c4f38db4d8cdf2d3720b3aef032e5e.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
(2)求证:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/663f9af86fdc4387b4541d0329573a29.png)
您最近一年使用:0次
2020-09-22更新
|
532次组卷
|
7卷引用:四川省成都市龙泉驿区第一中学校2019届高三12月月考数学(理)试题
四川省成都市龙泉驿区第一中学校2019届高三12月月考数学(理)试题河南省郑州市2018届高三毕业年级第二次质量预测理科数学试题(已下线)2017-2018学年度下学期高中期末备考【通用版】高二【精准复习模拟题】C【拔高卷01】【理科数学】(教师版)江西省上饶市横峰中学2020届高三下学期高考适应性考试数学(理)试题陕西省西北工业大学附属中学2019届高三下学期模拟训练(4)数学(理)试题(已下线)专题09 导数压轴解答题(证明类)-1(已下线)模块三 大招8 不等式证明——分割与放缩
9 . 已知数列
的首项
,前n项和为
,且数列
是以
为公差的等差数列.
(1)求数列
的通项公式;
(2)设
,
,数列
的前n项和为
,
①求证:数列
为等比数列,
②若存在整数
,使得
,其中
为常数,且
,求
的所有可能值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dea1dd4ffcb4cf0697ca43079f6a1f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a4a67138f29758d025473086601cef0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
①求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5603dc343728b22e51232c29f3f3078b.png)
②若存在整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcdadadbcaa0389c215808c7b1c56dec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08af7c08eb7ce9f86b54d5ca848ce965.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcb74292380b8df9519b9c33bfd564f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
2020-11-27更新
|
850次组卷
|
5卷引用:江苏省南京市2020届高三9月学情调研数学试题
名校
解题方法
10 . 已知函数
,
.
(1)讨论函数
极值点的个数;
(2)若函数
有两个极值点
,
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c69103038c41f2665f7179299730c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dd8b3dc4c609bab82d356a5cc2208d.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a11443171293fde8985c8805841d7f4.png)
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2020-09-02更新
|
4097次组卷
|
6卷引用:山东省烟台市2019-2020学年高二下学期期末考试数学试题