名校
1 . 在四棱锥
中,侧面
底面
,底面
为菱形,点
为
的中点,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60826ea9ab1f987c560f7df3b71f1233.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16acf46d7dab8fdd5ea222edee163bd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16ab2c14a4cce23c0a82e124227ef10b.png)
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/9/5647f1d2-efda-49a8-8f12-6c78dff0f186.png?resizew=162)
(1)证明:
平面
;
(2)求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5164a3cc47e266446d49127e2ef10c37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d28c625d7ac6878957facc8274d459c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60826ea9ab1f987c560f7df3b71f1233.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16acf46d7dab8fdd5ea222edee163bd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16ab2c14a4cce23c0a82e124227ef10b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/9/5647f1d2-efda-49a8-8f12-6c78dff0f186.png?resizew=162)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac0b72906641ed13716cfbce50923282.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
您最近一年使用:0次
名校
2 . 已知
是空间的一个基底,且
,
,
,
.
(1)求证:
,
,
,
四点共面;
(2)
能否作为空间的一个基底?若能,试用这一基底表示
;若不能,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5401d7f4a297c8b097e74bdebaaa8570.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33c854abb7eb1bb8e09433eb6f22dc70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f64be8f8016561b63843c72977eba7a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee7443cc42d784c22523915501ad909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01a492106de3a9a64755275e30ba16e0.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.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)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639cdeadbc9e566f81d65a0506823b80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e723e57753f0a4fe1ef8ca1aee0e2117.png)
您最近一年使用:0次
2023-09-07更新
|
917次组卷
|
5卷引用:山西省金科大联考2023-2024学年高二上学期开学考试数学试题
山西省金科大联考2023-2024学年高二上学期开学考试数学试题四川省成都市新津区成外学校2023-2024学年高二上学期9月月考数学试题(已下线)高二上学期期中复习【第一章 空间向量与立体几何】十大题型归纳(拔尖篇)-2023-2024学年高二数学举一反三系列(人教A版2019选择性必修第一册)广东省广州市第八十九中学2023-2024学年高二上学期10月月考数学试题(已下线)模块四 专题4 大题分类练 《空间向量与立体几何》基础夯实练
解题方法
3 . 设
是定义在R上的奇函数,且对任意实数x,恒有
,当
时,
.
(1)求证:
是周期函数;
(2)当
时,求
的解析式;
(3)计算
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86d78dec1c1e00ec02d7bdaf76ef8901.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790daaa89fc9d093f45023becf765697.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3262781afb71e9dffc0b7fa1fe280cb2.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad814089e37543b2f547af9ae75b6dd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bee0917aecb4103c0943d25d8c9a98f.png)
您最近一年使用:0次
4 . 记
的内角A,B,C所对的边分别为a,b,c,
,
的面积为
,且
.
(1)证明:
;
(2)求
的外接圆的半径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc4f7ae63e7f73ea4f264b12161713.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1714dbcd86abd2c3687591eb25c49a36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21e3222d5f6d16085f59824d6d94a41c.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe29c42302504e7fd8577dbc7d130ac7.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
2023-09-30更新
|
547次组卷
|
3卷引用:山西省部分学校2024届高三下学期开学质量检测数学试题
名校
解题方法
5 . 如图,四棱锥
中,ABCD为正方形,E为PC中点,平面
平面ABCD.
(1)证明:
平面BDE;
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/30/a535f40c-e42f-4528-b999-519469517ad6.png?resizew=166)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8c2b786c64e6a9ed2ec5670cde74f86.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c583493109d50c9e4634c05e9042a9f.png)
您最近一年使用:0次
名校
解题方法
6 . 若函数
和
的图象均连续不断.
和
均在任意的区间上不恒为
的定义域为
的定义域为
,存在非空区间
,满足
,则称区间A为
和
的“
区间”.
(1)写出
和
在
上的一个
区间”(无需证明);
(2)若
是
和
的“
区间”,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c80f04f48040becbe5c906fc0f7eba4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dba8b8c37d039197ec051e732da5bb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d1a0fd1ad044a9ecfcba672779bd678.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cd4adaf169a82c0ec20b1d71eea8b95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5017cde801c0d0914137e02e61272786.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0047f659c182291c84c224df6b5e993f.png)
(1)写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec6263576e5c3f2324a8dac311476bf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/375c0821fd7bf942481fbc75ddd4c1df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0047f659c182291c84c224df6b5e993f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/306bfbc7ac378f6a0c2d6adab6a4aa6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0047f659c182291c84c224df6b5e993f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2023-02-18更新
|
152次组卷
|
4卷引用:山西省忻州市河曲县中学校2022-2023学年高一下学期开学考试数学试题
山西省忻州市河曲县中学校2022-2023学年高一下学期开学考试数学试题山西省忻州市2022-2023学年高一下学期开学考试数学试题(已下线)高一数学开学摸底考02-新高考地区开学摸底考试卷湖南省衡阳市衡阳县第二中学2023-2024学年高一上学期期末达标测试数学试题(A卷)
名校
解题方法
7 . 如图,在三棱柱
中,
分别是
的中点.求证:
平面
.
![](https://img.xkw.com/dksih/QBM/2020/10/15/2571760060555264/2572006874824704/STEM/2b11633a1dca4dc8894087f3cfda01b1.png?resizew=245)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90eec29368b17c1d77db33632d3b7e6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea848cd2aa3a464618020475097949fc.png)
![](https://img.xkw.com/dksih/QBM/2020/10/15/2571760060555264/2572006874824704/STEM/2b11633a1dca4dc8894087f3cfda01b1.png?resizew=245)
您最近一年使用:0次
8 . 在数列
中,
,
.
(1)设
,证明:
是等比数列,并求
的通项公式;
(2)设
为数列
的前n项和,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ea8d0e50065114b05ef2dc1ea1129cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c092d9b038d848cb2afd0e368037f1cf.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8078fcf1cbd3a2b96457605ba0ef566b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f465a44170e765ed018eeca0d3054dc.png)
您最近一年使用:0次
2020-10-29更新
|
1106次组卷
|
6卷引用:山西省山西大学附属中学2020-2021学年高二上学期9月模块诊断(开学考试)数学试题
名校
解题方法
9 . 如图,在直三棱柱
中,
,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/10/5bbd8748-fdce-4b54-8089-2265616b85c2.png?resizew=130)
(1)证明:平面
平面
;
(2)求平面
与平面
所成的二面角大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31dd5dab6f7af3b2facdb5de96704b28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f121eabff3c62c1a196d9ca5f6f83f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/10/5bbd8748-fdce-4b54-8089-2265616b85c2.png?resizew=130)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b9a3f868837555eb40234b3375f4a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ba9e20d667d04bf3ee7f55cc795ce01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
2020-07-10更新
|
1669次组卷
|
5卷引用:山西省太原师范学院附属中学2021-2022学年高二下学期开学测试(A卷)数学试题
解题方法
10 . 已知直线
,圆
.
(1)试证明:不论
为何实数,直线
和圆
总有两个交点;
(2)当
取何值时,直线
被圆
截得的弦长最短,并求出最短弦的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acd55f837e9c4e6bba1163ef13edd09b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eba6d86f05a7c3c6f0167bd076f9c99.png)
(1)试证明:不论
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
(2)当
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
您最近一年使用:0次
2020-06-26更新
|
543次组卷
|
3卷引用:山西省怀仁市第一中学云东校区2020-2021学年高二下学期第一次月考(入学考试)数学(理)试题