1 . 如图,三棱柱
中,侧棱垂直于底面,
,
,
是棱
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/11/0734ef87-a541-4a23-b4cc-5787d18d1b0a.png?resizew=138)
(1)证明:
;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8df8666e352d1b453da7ef6c5331dc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/512cc5f78111d4592f6d843db6915f4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/11/0734ef87-a541-4a23-b4cc-5787d18d1b0a.png?resizew=138)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1078007ed9c2736d7406745a3230dc72.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf9628142422a4884bd59538da6d312.png)
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2 . 已知数列
中,
,数列
的前
项和为
满足
.
(1)证明:数列
为等比数列;
(2)求数列
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/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61e95294d46f0aaf05504a420461d11b.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e2de706dc5f0439b989273a5367f63a.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95a7fdde068fec52c68a6018faa4267.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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3 . 已知函数
.
(1)当
时,证明
.
(2)讨论函数
零点的个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/762b3bb4b9b16cfe24bc6424fb3d2483.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e9c599e8d420006448905acec2b8234.png)
(2)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
您最近一年使用:0次
2023-02-25更新
|
914次组卷
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3卷引用:重庆市字水中学2022-2023学年高二下学期第一次月考数学试题
名校
解题方法
4 . 已知正项数列
,其前
项和
满足
.
(1)求
的通项公式;
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db4a3d61736f5ec6245bd612d4bb9571.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/251d8cebd19f16530eb3f09a3f054a72.png)
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2022-12-09更新
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2026次组卷
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4卷引用:重庆市十八中两江实验中学校2023届高三上学期第一次全真模拟数学试题
5 . 定义在
上的函数
,对任意的
,恒有
,且
时,有![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c73a98c1b3504e09bfbe0db849b0d24.png)
(1)判断
的奇偶性并证明;
(2)若
,函数
有三个不同的零点,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e64541d7f445079207b6f671adc7d662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab0c6f119137e1b6760d55956d99d963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c73a98c1b3504e09bfbe0db849b0d24.png)
(1)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8368c0b5a8aba9c036a20db2955e867e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cdf6c2edbf685e80090995b295a075a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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6 . 已知函数
在
处取得极值,其中
为常数.
(1)若
,求函数
的单调区间;
(2)若
,且函数有
两个不相等的零点
,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bd8deef2cc0e01b28304ebccf7fd69c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03ca13a93b5f401c0d39ba52b0cffcb0.png)
您最近一年使用:0次
2023-02-05更新
|
342次组卷
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2卷引用:重庆市字水中学2022-2023学年高二下学期第一次月考数学试题
名校
解题方法
7 . 如图,在四棱锥
中,底面
是矩形,
分别是
的中点,
平面
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/27/f4ebef55-56ad-4968-9a27-f04d56411930.png?resizew=180)
(1)证明:
平面
;
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790ef3382b1c731f2885eecfd92c2a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41a5e38b446671e65bea6aea5af15446.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/27/f4ebef55-56ad-4968-9a27-f04d56411930.png?resizew=180)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a10ec513600c19b4bd140ce3da17355.png)
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2023-01-07更新
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496次组卷
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7卷引用:重庆市字水中学2023-2024学年高二上学期10月月考数学试题
重庆市字水中学2023-2024学年高二上学期10月月考数学试题2015届北京市月坛中学高三上学期期中考试理科数学试卷广西玉林市田家炳中学2014-2015学年高二5月月考数学试题宁夏石嘴山市第三中学2023-2024学年高二上学期9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(已下线)第一章 点线面位置关系 专题二 空间垂直关系的判定与证明 微点1 空间直线垂直的判定与证明【基础版】(已下线)专题4 大题分类练(空间向量与立体几何)基础夯实练 高二期末
8 . 如图,在长方体
中,点
分别在棱
上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/25/2bffead2-564b-48b9-aad2-b9b902aadeba.png?resizew=158)
(1)证明:
;
(2)若
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff7ddbb49c644bf06ccbad885ba2c84a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ce9b6bb1f3e46026af863b2b269ecf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b92de98e3d0422f62885734a07b59413.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/130bee63613368ae90cceb92f1868227.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/25/2bffead2-564b-48b9-aad2-b9b902aadeba.png?resizew=158)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adbe28084ef96eafc2b91719644a0cb.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b579112bc4b3e71572ccdbfd4475cfb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e719971a3bc4cc21d9a1a4fc99e3278.png)
您最近一年使用:0次
名校
解题方法
9 . 如图,在四边形
中,
于交
点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c71ef914882dcafa19ed1ea63ff3008d.png)
,
.沿
将
翻折到
的位置,使得二面角
的大小为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/8cf0fc60-49d4-4274-9afc-427e1844bb65.png?resizew=235)
(1)证明:平面
平面
;
(2)在线段
上(不含端点)是否存在点
,使得二面角
的余弦值为
,若存在,确定点
的位置,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6992cf6aa556bf6e61f098ee75f2de66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cc50511075e9645c3201be97170ae7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c71ef914882dcafa19ed1ea63ff3008d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72e49817548cb45b3d1e58570644c6fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec6246613bb4c4b2ef93770e427e8eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/8cf0fc60-49d4-4274-9afc-427e1844bb65.png?resizew=235)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eda0f75d56aa1571a0839619ffe21fed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d923a338dd2d2e29336b42574d38448.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c2bc5e50b8dfa02601c70822252854a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4b4e098c6194f55462b24f552f5967.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f1a057a619eec2f14d65aff8bcd0906.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
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2022-11-28更新
|
739次组卷
|
4卷引用:重庆市江北区字水中学2023-2024学年高二上学期第二次月考数学试题
解题方法
10 . 如图,已知长方体
中,
,点E是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/19/3e427fbb-8821-419b-8a55-be0736d6b9aa.png?resizew=205)
(1)求证:
平面
;
(2)求点E到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9662bb2fa5e9f9a2958c5c628f5a51b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/554b3b4c5ce7aca81becc07ed4903736.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/19/3e427fbb-8821-419b-8a55-be0736d6b9aa.png?resizew=205)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b7bfc1d0b50681765bd3fa6d5920ed8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65277734669566578cbb7d690bb200fb.png)
(2)求点E到平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc78a86b12ba0b4553135a3a635fc418.png)
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2022-05-29更新
|
811次组卷
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2卷引用:重庆市二0三中学校2021-2022学年高一下学期第二次月考数学试题