名校
解题方法
1 . 设正项数列
满足
,且
.
(1)证明:数列
是等差数列,并求数列
的通项公式;
(2)设
,求证:数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81121ab69eba7ae935cee7e0abf04b6f.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce97e30e9baa1f3c2017c9d81b7da19b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/306ba3f2982e5eb6eebea26114b49d59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/105de1b20942840a12712c6795a05e1b.png)
您最近一年使用:0次
2022-11-22更新
|
1622次组卷
|
7卷引用:天津市第二中学2022-2023学年高二上学期12月学情调查数学试题
天津市第二中学2022-2023学年高二上学期12月学情调查数学试题山东省滨州市邹平市第一中学2022-2023学年高三上学期期中考试数学试题山东省淄博市张店区2022-2023学年高三上学期期中数学试题山东省济南市2022-2023学年高三上学期期中数学试题安徽省滁州市定远县育才学校2023届高三上学期期末数学试题(已下线)专题突破卷17 数列求和-2(已下线)山东省济南市2022-2023学年高三上学期期中数学试题变式题19-22
2 . 已知椭圆:
:
的离心率
,连接椭圆的四个顶点得到的菱形的面积为
.
,
是椭圆
的两个焦点.
(1)求椭圆
的方程;
(2)设直线
与椭圆
相交于不同的两点
,已知点
的坐标为
,若
,求直线
的方程;
(3)设
是椭圆
上一点,直线
与椭圆
交于另一点
,点
满足:
轴且
,求证:
是定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5de85df85401e7e8da683ea4a784963c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fe013901c25520004b736da8d54a928.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/363a5f6854c95f0e1c68351286d0f265.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ac86e1c253297a377e14fb9a1689be8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2784a52c4da98dc9df661fc152fc29e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23d6de923fac9e8a6bccfb8e2b68a4bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b57abf0dc1e0bf1a11dbef810607de18.png)
您最近一年使用:0次
3 . 已知数列
是等差数列,其前n项和公式为
,数列
是等比数列
,
,
,
.
(1)求数列
和
的通项公式;
(2)令
,求数列
的前n项和
,求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3970764ee88225c452c40de226eafcbc.png)
(3)令
,求数列
的前n项和
;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/385275d29d8c8a7841eaeaa3dfab2cdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6347170e120865f690485dc77d227ec6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b478c8d7a765b4ec9218f68ac24531.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4dfec7297c966dd8666301ae9fec6e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3970764ee88225c452c40de226eafcbc.png)
(3)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74898ff2fe4d09546e53565c1c6cf553.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b783cf91e34e692ce8e171f0965cb53f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
名校
解题方法
4 . 已知
是椭圆
的左焦点,上顶点B的坐标是
,离心率为
.
(1)求椭圆的标准方程;
(2)O为坐标原点,直线l过点
且与椭圆相交于P,Q两点.
①若
的面积为
,求直线l的方程;
②过点
作
与直线
相交于点E,连接
,与线段
相交于点M,求证:点M为线段
的中点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e82fe25db889399bb3ca4ffd5dd5db84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c63dd5f3379e6bdeb875e7d2b11509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9faec7f89410146ea404047c421038d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63df78dd883e274ecf7d4017ef5efcdc.png)
(1)求椭圆的标准方程;
(2)O为坐标原点,直线l过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e82fe25db889399bb3ca4ffd5dd5db84.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c6fe88426a42b18d78b885d9bc7737d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b07cb0310ad90bb082cc2dadcf6905e5.png)
②过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e82fe25db889399bb3ca4ffd5dd5db84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1230b4d97ffc0306c232bd1130407dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6ee3d232ba74ea4254cab439cef8f62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
您最近一年使用:0次
2022-10-24更新
|
1091次组卷
|
6卷引用:天津市滨海新区塘沽第十三中学2022-2023学年高二上学期期中数学试题
天津市滨海新区塘沽第十三中学2022-2023学年高二上学期期中数学试题天津市四校(杨柳青一中、咸水沽一中 、四十七中,一百中学)2020-2021学年高二上学期期末联考数学试题北京市对外经贸大学附属中学2022-2023学年高二上学期期中质量监测数学试题(已下线)高二上学期期末【压轴60题考点专练】(选修一+选修二)-2022-2023学年高二数学考试满分全攻略(人教A版2019选修第一册)(已下线)专题19 圆锥曲线(讲义)-2天津市咸水沽第一中学2020-2021学年高三上学期第二次月考数学试题
解题方法
5 . 如图,长方体
中,AB=4,AD=3,AA1=5,E,F分别在BB1,DD1上,且
,
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/13/0c2a9c98-3263-4c8e-bec7-3223daf865b7.png?resizew=212)
(1)求证:
平面
;
(2)求平面
与平面
的夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc99486bf8b729aabccd7e7c1cecef36.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/13/0c2a9c98-3263-4c8e-bec7-3223daf865b7.png?resizew=212)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d26d8a9d64ad3c8cba28840b41ed7837.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab6bf42c7db96104456424e4d1be6c48.png)
您最近一年使用:0次
名校
解题方法
6 . 如图,在三棱锥
中,平面
平面
,
,
为
的中点,
是边长为1的等边三角形,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/11/6c4966d2-fbe2-48b3-ae39-61bc45cbbe52.png?resizew=219)
(1)证明:
;
(2)求直线
和平面
所成角的正弦值;
(3)在棱
上是否存在点
,使二面角
的大小为
?若存在,并求出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf6dc837ae85207789b94d109c5c2eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4807ca16360c0cca436e59d4be98f626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0482d12694d419694ecab90485ab70f8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/11/6c4966d2-fbe2-48b3-ae39-61bc45cbbe52.png?resizew=219)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21be01a95cdd3149512bf95d6084fdd6.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(3)在棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/324d453870b345da0c41977290192f94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a50b31b40c0d28bed4572ce27b30a19.png)
您最近一年使用:0次
2022-11-08更新
|
1487次组卷
|
3卷引用:天津市宁河区芦台第一中学2022-2023学年高二上学期期中考前统练数学试题
名校
7 . 已知函数
.
(1)讨论函数
的单调区间;
(2)若
且
, 证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e294eccc7c066cb7c7e5d4461c507a1.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f6bfdb24ecf5da863405c2b40936ff9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b577aec648fac7442e866ea82dcc823.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91a820eeedf19c623656971109c3d913.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ab3e1b3de26df75bc93296dfb03c29e.png)
您最近一年使用:0次
8 . 已知椭圆
的离心率为
,直线
与椭圆C相切于点
.
(1)求椭圆C的方程;
(2)已知直线
与椭圆C交于不同的两点M,N,与直线
交于点Q(P,Q,M,N均不重合),记
的斜率分别为
,若
.
①求△
面积的范围,
②证明:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4754fbe523ca63eba3810a3f88f37df3.png)
(1)求椭圆C的方程;
(2)已知直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44434b647ec546fe787e2164e0be6cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90963760acac7bfad3ae03088c6c80b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7eac9ba606fb477550aa62db7bfa0ac4.png)
①求△
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22ce50ba5e349425274f05d46d120a74.png)
②证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7dcdbca8887b10ad21851817d2a4490.png)
您最近一年使用:0次
名校
9 . 已知函数
(
,
为自然对数的底数).
(1)当
时,求
的极值;
(2)设函数
,若
在其定义域内恒成立,求实数
的最小值;
(3)若关于
的方程
恰有两个相异的实根
,
,求实数
的取值范围,并证明
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/620809df01729bc526807d556a5e2b65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dd8b3dc4c609bab82d356a5cc2208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/200f24e682c93e02a87f3f9d57dc5d40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c8966e90f7443ad4ee6d777d0de31d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1a2c01ac2a7f6ad7e03cb7a61daefab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b1c079afd1b058adc67a50f48f3d466.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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a3ad8c843c361565d0f3cb06da49f60.png)
您最近一年使用:0次
2022-03-15更新
|
1211次组卷
|
4卷引用:天津市第四十二中学2021-2022学年高二下学期期末数学试题
天津市第四十二中学2021-2022学年高二下学期期末数学试题天津市河西区2021-2022学年高三上学期期末数学试题(已下线)高二数学下学期期末精选50题(压轴版)-2021-2022学年高二数学考试满分全攻略(人教A版2019选修第二册+第三册)(已下线)模块八 专题11 以函数与导数为背景的压轴解答题
2021高三上·山东·专题练习
名校
10 . 如图,在四棱锥
中,
为等边三角形,
平面
,二面角
的大小为60°.
![](https://img.xkw.com/dksih/QBM/2021/4/13/2699161539764224/2699504057581568/STEM/d96c1a5c-e042-43fa-bab2-c9148404922d.png?resizew=202)
(1)求证:
平面
;
(2)已知
,在线段
上是否存在点
,使得直线
与平面
所成角的正弦值为
?若存在,请确定点
的位置;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5164a3cc47e266446d49127e2ef10c37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fd680b3e2aeaba55e0b3b2486a0a3a8.png)
![](https://img.xkw.com/dksih/QBM/2021/4/13/2699161539764224/2699504057581568/STEM/d96c1a5c-e042-43fa-bab2-c9148404922d.png?resizew=202)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6785c7c85a503531649f9c9b4cbfcf04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d666dd3308604685e59f4ca22663b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3aace91caec728e174daec29a3568ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
您最近一年使用:0次
2021-04-14更新
|
1872次组卷
|
7卷引用:天津市静海区第一中学2022-2023学年高二上学期第一次月考数学试题