解题方法
1 . 如图,长方体
的底面
是正方形,点
在棱
上,
.
(1)证明:
平面
;
(2)若
,
,求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c810d9d154dbbc0cef6ab8ffcd488045.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/22/e5747308-c615-4cff-8f60-47b2ce08bbf9.png?resizew=122)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/662698361c6b3ddaf0c28a3c87be53e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02c4f474f2c144be8703517ef72b98a7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51d0fdc5a00ca0e857b89a7e1420df29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e238bddad2ce99ad06214bf9d4eecc30.png)
您最近一年使用:0次
2023-07-21更新
|
689次组卷
|
3卷引用:云南省迪庆州2022-2023学年高一下学期期末考试数学试题
2 . 已知
.
(1)判断函数
的奇偶性,并说明理由;
(2)当
时,判断函数
在区向
上的单调性,并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8f4ef15b94a4a3e3d8a29d2f37b216a.png)
(1)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/200f24e682c93e02a87f3f9d57dc5d40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed6d804ef44bfc64f824b0ccef71765e.png)
您最近一年使用:0次
名校
3 . 如图,在四棱锥P-ABCD中,四边形ABCD为矩形,
,
.
为等边三角形,平面
平面ABCD,E为AD的中点.
![](https://img.xkw.com/dksih/QBM/2022/4/19/2961692328255488/2962262516613120/STEM/50663824-c7f6-4e01-9dbf-884e56ff19cd.png?resizew=205)
(1)求证:
;
(2)求平面PAC与平面ABCD夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://img.xkw.com/dksih/QBM/2022/4/19/2961692328255488/2962262516613120/STEM/50663824-c7f6-4e01-9dbf-884e56ff19cd.png?resizew=205)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04fb30a9d07e410ac92c34b8ad0133db.png)
(2)求平面PAC与平面ABCD夹角的余弦值.
您最近一年使用:0次
2022-04-20更新
|
1345次组卷
|
6卷引用:云南省迪庆州藏文中学2023-2024学年高二上学期期中考试数学试题
18-19高三上·上海浦东新·开学考试
4 . 如图,将边长为
的正方形
沿对角线
折叠,使得平面
与平面
所成二面角为直角,
平面
,且
.
![](https://img.xkw.com/dksih/QBM/2021/10/25/2836806852558848/2837660124364800/STEM/4ad769f983514dc4a51a56cebe631dc6.png?resizew=181)
(1)求证:直线
与平面
没有公共点;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dfaad4c4467e27421876d8f2a4371d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4c3f9dd5d0343597a7f58a1989b537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/338c6c83ab4abc895ac36ab888a55be6.png)
![](https://img.xkw.com/dksih/QBM/2021/10/25/2836806852558848/2837660124364800/STEM/4ad769f983514dc4a51a56cebe631dc6.png?resizew=181)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/926584088b939200d88e64318f2d4e6c.png)
您最近一年使用:0次
2021-10-26更新
|
337次组卷
|
6卷引用:云南省迪庆藏族自治州民族中学2022-2023学年高二下学期3月检测数学试题
云南省迪庆藏族自治州民族中学2022-2023学年高二下学期3月检测数学试题(已下线)上海市华东师大第二附属中学2018-2019学年高三上学期第一次周测(开学考)数学试题上海交通大学附属中学2021届高三下学期开学考试数学试题上海市青浦高级中学2021届高三上学期9月开学考试数学试题(已下线)模块15 简单几何体-2022年高考数学一轮复习小题多维练(上海专用)(已下线)第01讲 空间直线与平面(核心考点讲与练)(2)