名校
1 . 在平面直角坐标系xOy中,已知椭圆C:
的离心率为
,短轴长为2.
(1)求椭圆C的标准方程;
(2)已知点A,B分别为椭圆C的左、右顶点,点D为椭圆C的下顶点,点P为椭圆C上异于椭圆顶点的动点,直线AP与直线BD相交于点M,直线BP与直线AD相交于点N.证明:直线MN与x轴垂直.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
(1)求椭圆C的标准方程;
(2)已知点A,B分别为椭圆C的左、右顶点,点D为椭圆C的下顶点,点P为椭圆C上异于椭圆顶点的动点,直线AP与直线BD相交于点M,直线BP与直线AD相交于点N.证明:直线MN与x轴垂直.
您最近一年使用:0次
2023-03-13更新
|
275次组卷
|
12卷引用:广西来宾市2020-2021学年高二上学期期末数学(理)试题
广西来宾市2020-2021学年高二上学期期末数学(理)试题陕西省宝鸡市2020-2021学年高二上学期期末理科数学试题山西省山西名校2020-2021学年高二上学期期末数学(文)试题广西河池市2020-2021学年高二上学期期末数学(理)试题贵州省镇远县文德民族中学校2020-2021学年高二3月月考数学(理)试题(已下线)期末重难点突破专题04-【尖子生专用】2021-2022学年高二数学考点培优训练(人教A版2019选择性必修第一册)陕西省咸阳市永寿县中学2022-2023学年高二下学期第一次月考理科数学试题河南省顶尖名校联盟2022-2023学年高二下学期5月期中联考数学试题云南省昆明市官渡区尚品书院学校2022-2023学年高二下学期3月月考数学试题黑龙江省绥化市绥棱县第一中学2023-2024学年高二上学期9月月考数学试题山西省朔州市怀仁市第一中学校2024届高三上学期第一次月考数学试题安徽省芜湖市繁昌皖江中学2023-2024学年高一上学期第一次阶段性检测数学试题
名校
解题方法
2 . 如图,在正四棱柱
中,
,
分别是
,
的中点,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/5c2677d4-572d-4560-ab46-24c3e6481419.png?resizew=188)
(1)求证:平面
平面
;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d262480ffb55b7617f44b63f130c154a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ef8866ccf160ddc441bf69c5d3a3d5a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/5c2677d4-572d-4560-ab46-24c3e6481419.png?resizew=188)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0410458ba8ffd77471dd645582ab3ff0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da7977ab975efa6411cc17de39be70d9.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da7977ab975efa6411cc17de39be70d9.png)
您最近一年使用:0次
名校
解题方法
3 . 如图,在棱长为2的正三棱柱
中,
的中点为
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/1bf7d382-69ce-4a25-8ab2-c07cbfef155b.png?resizew=137)
(1)求证:
平面
;
(2)求
与
所夹的角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88b866f54e2c5c1df06364cdc7eb59bc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/1bf7d382-69ce-4a25-8ab2-c07cbfef155b.png?resizew=137)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b78172568aac9805d2ea2d5f742bf80c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
您最近一年使用:0次
4 . 已知
的长轴长为4,短轴长为2.
(1)求椭圆C的标准方程;
(2)点A,B分别为椭圆C的左、右顶点,点P为椭圆C上的动点(异于A,B两点),过原点O作直线PB的垂线,垂足为H,直线OH与直线AP相交于点M,证明:点M的横坐标为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
(1)求椭圆C的标准方程;
(2)点A,B分别为椭圆C的左、右顶点,点P为椭圆C上的动点(异于A,B两点),过原点O作直线PB的垂线,垂足为H,直线OH与直线AP相交于点M,证明:点M的横坐标为定值.
您最近一年使用:0次
2021-01-27更新
|
865次组卷
|
5卷引用:广西来宾市2020-2021学年高二上学期期末数学(文)试题
5 . 用反证法证明命题“已知
,且
,则
中至少有一个大于
”时,假设应为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dcbca3478eae63853d2aab5332e2e56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f9e131cdd242d56b6dba05ab3363ef3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
A.![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
您最近一年使用:0次
2020-03-27更新
|
326次组卷
|
2卷引用:广西来宾市2018-2019学年高二下学期期末教学质量调研数学(文科)试题
6 . 如图,在直三棱柱
中,
,
,
,
,
分别是
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/161b1d46-2c7a-429c-8cd3-b6ba5aef0a7c.png?resizew=222)
(1)证明:
平面
.
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/986ba572d8373df48c996f8c8611498c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/392b9e1a179a6676362679354a9e7e51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51e3555a1a081771a192f4d4de196e30.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/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/161b1d46-2c7a-429c-8cd3-b6ba5aef0a7c.png?resizew=222)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02438f0423acd0ff2dfa5ffb6abf143f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fc7991ea17d54ff5f4445ac5699463.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fc7991ea17d54ff5f4445ac5699463.png)
您最近一年使用:0次
2020-01-17更新
|
1084次组卷
|
7卷引用:广西壮族自治区来宾市2019-2020学年高二上学期期末数学(理)试题
名校
7 . 已知函数
.
(1)若
,求
的零点个数;
(2)若
,
,证明:
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb0741ddac30027c3b38d80011410ae5.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c712829d60b4ea93966a5c68c24d677.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10826cd4c38b66e38c5814bc194db4db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d33d41d398944a02f613784ff1ceeaf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b5b017de7aec0711fef053f1a0197a3.png)
您最近一年使用:0次
2019-07-29更新
|
895次组卷
|
5卷引用:广西来宾市2018-2019学年高二下学期期末教学质量调研考试数学(理科)试题
名校
8 . 已知
,其前
项和为
.
(1)计算
;
(2)猜想
的表达式,并用数学归纳法进行证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3fe63b9f8bb4cc5f9dd3e4606bbb694.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(1)计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/765def622d9ab7d1eb806ed0f8ebe2fe.png)
(2)猜想
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
您最近一年使用:0次
2019-06-28更新
|
390次组卷
|
4卷引用:广西来宾市2018-2019学年高二下学期期末教学质量调研考试数学(理科)试题
解题方法
9 . 在如图所示的几何体中,四边形
为正方形,四边形
为直角梯形,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/c347f517-5b82-4f09-b0b0-5642f40cb3a4.png?resizew=208)
(1)求
与平面
所成角的正弦值;
(2)线段
或其延长线上是否存在点
,使平面
平面
?证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62ce0b6f5e83a53ab771425ff9ee63b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd943bcf647d786c150565851896570.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/c347f517-5b82-4f09-b0b0-5642f40cb3a4.png?resizew=208)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca48c18021e7be4bbb3e95576e1c1b5f.png)
(2)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/677d1863ff4d8ac1604b18149d4f320f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
您最近一年使用:0次
2018-03-03更新
|
548次组卷
|
2卷引用:广西来宾市2017-2018学年高二上学期期末教学质量调研数学(理)试题
名校
10 . 数列
中,已知
,
.
(1)计算
的值,并归纳猜想出数列
的通项公式;
(2)试用数学归纳法证明你归纳猜想出的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ea8d0e50065114b05ef2dc1ea1129cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7d520b0b1415b0f57b0f4319ad6085c.png)
(1)计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed529240a883f68f0921e818addeb9c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)试用数学归纳法证明你归纳猜想出的结论.
您最近一年使用:0次
2018-04-11更新
|
751次组卷
|
3卷引用:广西象州县中学2019-2020学年高二4月月考数学(文)试题