1 . 已知函数
,曲线
在点
处的切线为
,记
.
(1)当
时,求切线
的方程;
(2)在(1)的条件下,求函数
的零点并证明
;
(3)当
时,直接写出函数
的零点个数.(结论不要求证明)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2be6b7c590b12db1b6cbe451ad18c4ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd817a1014876a72ad1971548ed6f52c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43db00e106c7d08a76a7ba71ca5e63d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db57c256dac51842864d269d5cdab520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa662f0273f0921c1fa4727f632395.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/909736dad505d81be43aef91e6309bf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)在(1)的条件下,求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a813b5adbf5c7082561237894ba6d599.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a93aef9c6c4b64df420c39ef19d1551.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efe8dc8e5def7d46b88535453ae1fd96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a813b5adbf5c7082561237894ba6d599.png)
您最近一年使用:0次
2 . 设非零向量
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c367ebf81da8ce860b8d4db598ce3b0.png)
,并定义![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8de1a1abedbffcec3416ebfbba00c22b.png)
(1)若
,求
;
(2)写出![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9ee7554e993fa6d1035ea7da1621b6f.png)
之间的等量关系,并证明;
(3)若
,求证:集合
是有限集.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48b45cac4b26830e829a80640bf01673.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c367ebf81da8ce860b8d4db598ce3b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4776b8be0546414c6a82e0f7c21315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8de1a1abedbffcec3416ebfbba00c22b.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b69cf5eb74f6f3b69186a665b06696d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9abc628cb2ec8b1250ac0e86a034611.png)
(2)写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9ee7554e993fa6d1035ea7da1621b6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4776b8be0546414c6a82e0f7c21315.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fffedfb01c0a6802e19c44067252fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac41950e0db22f2216407b7e3999b51d.png)
您最近一年使用:0次
2023-07-25更新
|
502次组卷
|
3卷引用:北京市丰台区2022-2023学年高一下学期期末考试数学试卷
北京市丰台区2022-2023学年高一下学期期末考试数学试卷(已下线)专题07 向量应用-《重难点题型·高分突破》(苏教版2019必修第二册)【北京专用】专题06平面向量(第二部分)-高一下学期名校期末好题汇编
3 . 如图,在多面体
中,四边形
是边长为
的正方形,平面
平面
,
,
,
.
(1)求证:
平面
;
(2)求平面
与平面
夹角的余弦值;
(3)线段
上是否存在点
,使得
平面
?若存在,指出点
的位置并证明;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79c1acdd27cebb11e0266464b03b3afb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8139d9fd5c670c91aa7dc485366dd1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e41916523511064a97de39b0f2b323.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5e5c1b19afa9febdef52968bd55a320.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/22/886d39e6-9812-4d18-a1a9-4db4c413ccc3.png?resizew=136)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(3)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12d8677ae5ca7acf874d93789425d172.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
您最近一年使用:0次
2023-11-03更新
|
442次组卷
|
2卷引用:北京市丰台区2023-2024学年高二上学期期中练习数学试题(A)
4 . 已知椭圆
过点
,
两点.
(1)求椭圆E的方程;
(2)过点P的直线l与椭圆E交于C,D两点.
(i)若点P坐标为
,直线BC,BD分别与x轴交于M,N两点.求证:
;
(ii)若点P坐标为
,直线g的方程为
,椭圆E上存在定点Q,使直线QC,QD分别与直线g交于M,N两点,且
.请直接写出点Q的坐标,结论不需证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a200ca2c4af794f4d1c6a5443830b5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/448c0a5ee776d19ce8e42ac9a5fd27c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49cba284d675a3028d7a8d54f1f8ae70.png)
(1)求椭圆E的方程;
(2)过点P的直线l与椭圆E交于C,D两点.
(i)若点P坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fad20e2bc6576fc461419f8f138d26e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b485b62d004d52fb31d6ed99ccb7669.png)
(ii)若点P坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8ba2b1920103e0879cff3de727a90c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/382b0ad2e5ba2ddd25654b64eafce84a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b485b62d004d52fb31d6ed99ccb7669.png)
您最近一年使用:0次
解题方法
5 . 如图,在直角梯形
中,
,
,
,并将直角梯形
绕AB边旋转至ABEF.
平面ADF;
(2)求证:直线
平面ADF;
(3)当平面
平面ABEF时,再从条件①、条件②、条件③这三个条件中选择一个作为已知,使平面ADE与平面BCE垂直.并证明你的结论.
条件①:
;
条件②:
;
条件③:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6045266f6db39e41b7abde762d9e9a57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
(2)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d27ff0b39832f094ec51e28721d739.png)
(3)当平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf9a6db3571fa57bfa2d5e4d44c51b3.png)
条件①:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6166b9a5437671bcba31e17c375eb39.png)
条件②:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
条件③:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c182a9d9fd0a7023b710cd671d9468e7.png)
您最近一年使用:0次
2022-07-08更新
|
1298次组卷
|
11卷引用:北京市丰台区2021-2022学年高一下学期期末练习数学试题
北京市丰台区2021-2022学年高一下学期期末练习数学试题(已下线)7.2 空间几何中的垂直(精练)(已下线)7.1 空间几何中的平行与垂直(精讲)(已下线)高考新题型-立体几何初步(已下线)8.6.1 空间直线、平面的垂直(精练)-2022-2023学年高一数学一隅三反系列(人教A版2019必修第二册)(已下线)模块三 专题9(劣构题)拔高能力练(北师大版)(已下线)模块三 专题9(劣构题)基础夯实练(人教B)(已下线)模块三 专题9(劣构题)拔高能力练人教A版)(已下线)2023年高考全国乙卷数学(理)真题变式题16-20(已下线)模块三 专题10(劣构题)拔高能力练(苏教版)(已下线)专题06 空间中点线面的位置关系6种常考题型归类(1)-期期末真题分类汇编(北京专用)
名校
解题方法
6 . 已知数列
中,
,
(
,
).设
.
(1)求证:数列
是等差数列;
(2)设
,记数列
的前
项和为
.证明,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b039543372ce127c7b85782a118f0f12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af18dc260e0c3bd28552a01b3ce03503.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/272563b03d4e5a61b2adc85edc5cbdf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c88a7ef007c78a93e33bd77c4396626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c3fec47d2dd2b8099d86c87b6e57de8.png)
您最近一年使用:0次
2022-02-14更新
|
841次组卷
|
4卷引用:北京首师附中2021~2022学年高二上学期1月月考数学试题
北京首师附中2021~2022学年高二上学期1月月考数学试题(已下线)第02讲 等差数列(核心考点讲与练)-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)第四章 数列(A卷·知识通关练) (3)广东省佛山市顺德市李兆基中学2022-2023学年高二下学期3月月考数学试题
7 . 设数集
满足:①任意
,有
;②任意
、
,有
或
,则称数集
具有性质
.
(1)判断数集
是否具有性质
,并说明理由;
(2)若数集
且
具有性质
.
(i)当
时,求证:
、
、
、
是等差数列;
(ii)当
、
、
、
不是等差数列时,写出
的最大值.(结论不需要证明)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c8647b00cc8c8f35555c7d78cf2812c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45c8b2714e2f6ddfdd6b05d3b4de1149.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b8e5872f45d4b878b0119997cb5bae2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84734fbba70c0b45045fabf8090f810b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(1)判断数集
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2161a642b95463642adc3892850bc74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)若数集
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ddc189d2c675b0e2ade4f7ed40f66fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8509c4b8fef1e10a20fe1c3e9243ac8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(i)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76c7867969b14fd642147188b6ebf29c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(ii)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
2021-09-26更新
|
589次组卷
|
7卷引用:北京市丰台区2021届高三二模数学试题
8 . 已知无穷集合A,B,且
,
,记
,定义:满足
时,则称集合A,B互为“完美加法补集”.
(Ⅰ)已知集合
,
.判断2019和2020是否属于集合
,并说明理由;
(Ⅱ)设集合
,
.
(ⅰ)求证:集合A,B互为“完美加法补集”;
(ⅱ)记
和
分别表示集合A,B中不大于n(
)的元素个数,写出满足
的元素n的集合.(只需写出结果,不需要证明)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79012948c8ee1479db2258583bfdd1e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e8d78c280026d3b955104f1d59c50c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88068f26f2bd9df8cf4dc7bef0e9b89e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80b151bc7985e6704ce35e59ed82accd.png)
(Ⅰ)已知集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/623461180ef613668892f10149a2bfbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e974813f1e4f3369cbdfc054943c3c32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ce69cd33d105ce280170f0cd0513026.png)
(Ⅱ)设集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f25af29d858c34e25bdafbd14f9bc4c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7a081b3832b31d70c86efb680ef9d83.png)
(ⅰ)求证:集合A,B互为“完美加法补集”;
(ⅱ)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a65d9df3c6329662d36b8afba3bfc622.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a685f4b3b305b99f41ef69e3b403dbe8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48fa6cd1cd61c11616386da39d19ce8e.png)
您最近一年使用:0次
2020-06-23更新
|
692次组卷
|
4卷引用:北京市丰台区2020届高三下学期综合练习(二)(二模)数学试题
北京市丰台区2020届高三下学期综合练习(二)(二模)数学试题(已下线)卷04-【赢在高考·黄金20卷】备战2021高考数学全真模拟卷(北京专用)北京市一七一中学2020-2021学年高二6月月考数学试题北京市八一学校2023-2024学年高三下学期开学摸底考试数学试题
9 . 如图,在直角梯形
中,
,
,
平面
,
,
,
的中点为
.
(
)求证:
面
.
(
)求证:平面
平面
.
(
)当
为何值时,能使
?请给出证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fec9e3bf7ff287df2cbdff8addfaf5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ce3618abaf1907e7661e4204047f4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fb2e071d4e01107dcf7d95cbb86b415.png)
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10 . 如图,在三棱柱ABC-A1B1C1中,AA1C1C是边长为4的正方形.平面ABC⊥平面AA1C1C,AB=3,BC=5.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/13/4ca3cfb7-fea0-4c1f-b33e-a301806e022c.png?resizew=140)
(Ⅰ)求证:AA1⊥平面ABC;
(Ⅱ)求二面角A1-BC1-B1的余弦值;
(Ⅲ)证明:在线段BC1存在点D,使得AD⊥A1B,并求
的值.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/13/4ca3cfb7-fea0-4c1f-b33e-a301806e022c.png?resizew=140)
(Ⅰ)求证:AA1⊥平面ABC;
(Ⅱ)求二面角A1-BC1-B1的余弦值;
(Ⅲ)证明:在线段BC1存在点D,使得AD⊥A1B,并求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c04c68f1ef1e37534b5bbc7a1f592ef7.png)
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2016-12-02更新
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30卷引用:北京市丰台区第十二中学2021-2022学年高二上学期期中数学试题
北京市丰台区第十二中学2021-2022学年高二上学期期中数学试题2013年全国普通高等学校招生统一考试理科数学(北京卷)(已下线)2014届上海交大附中高三数学理总复习二空间向量与立体几何练习卷2016-2017学年湖北省重点高中联考协作体高二下学期期中考试数学(理)试卷湖北省宜昌市葛洲坝中学2018届高三9月月考数学(理)试题【全国百强校】江苏省泰州中学2017-2018学年高二6月月考数学(理)试题【全国百强校】宁夏银川一中2019届高三第四次月考数学(理)试题专题11.8 空间向量与立体几何(练)-江苏版《2020年高考一轮复习讲练测》湖南省长沙市长郡中学2017-2018学年高二下学期入学考试数学(理)试题人教A版(2019) 选择性必修第一册 过关斩将 第一章 空间向量与立体几何 专题强化练3 立体几何中的存在性与探究性问题福建省连城县第一中学2020-2021学年高二上学期第一次月考数学试题江西省景德镇一中2020-2021学年高二(2班)上学期期中考试数学试题(已下线)第一章 空间向量与立体几何单元检测(知识达标卷)-【一堂好课】2021-2022学年高二数学上学期同步精品课堂(人教A版2019选择性必修第一册)河北省涞水波峰中学2020-2021学年高二上学期期末数学试题(已下线)专题03 空间向量与立体几何-立体几何中的存在性与探究性问题-2021-2022学年高二数学同步练习和分类专题教案(人教A版2019选择性必修第一册)(已下线)专练9 专题强化练3-立体几何中的存在性与探究性问题-2021-2022学年高二数学上册同步课后专练(人版A版选择性必修第一册)(已下线)期中考试重难点专题强化训练(1)——向量的综合运用-2021-2022学年高二数学单元卷模拟(易中难)(2019人教A版选择性必修第一册+第二册)海南热带海洋学院附属中学2021届高三11月第二次月考数学试题江西省靖安中学2021-2022学年高二上学期第一次月考数学(理)试题苏教版(2019) 选修第二册 名师精选 第六章 空间向量与立体几何云南省弥勒市第一中学2021-2022学年高二上学期第三次月考数学试题安徽省合肥市第八中学2021-2022学年高二下学期平行班开学考理科数学试题河南省濮阳市范县第一中学2021-2022学年高二上学期第二次月考检测数学试题河南省鹤壁市浚县浚县第一中学2021-2022学年高一下学期7月月考数学试题2023版 北师大版(2019) 选修第一册 名师精选卷 第三章 空间向量与立体几何重庆市忠县乌杨中学校2021-2022学年高二上学期期中数学试题云南省曲靖市罗平县第二中学2021-2022学年高二上学期第二次月考数学试题福建省福州市福州中加学校2023-2024学年高二上学期期中数学试题(已下线)第五章 破解立体几何开放探究问题 专题一 立体几何存在性问题 微点1 立体几何存在性问题的解法(一)【基础版】(已下线)【一题多解】存在与否 向量探索