1 . 已知数列
满足
,
,
.
(1)求证数列
是等比数列,并求数列
的通项公式;
(2)设
,数列
的前
项和为
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3369ae2337f8d6a049fd8e5a9f313f87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
(1)求证数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c895d4ce5ce82ef9b311b9369b4de11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/017a49f5aebadd0aef6449abb44b8baa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.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/ab2a823b63d3f6634f0a294bec20aea0.png)
您最近一年使用:0次
2 . 如图,在多面体
中,四边形
为正方形,
平面
,
,
,
,
,
是
的中点,
与
交于点
.
平面
;
(2)求直线
和平面
所成角的大小.
![](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/6a22d6b860f06fe23618b0d3de6768fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bb5f97d47fbb49fcfcdc7f5e882a80b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d5a2cd05e4476fc72271e8fdb59a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db37b5ce697dab3189a15881d00fcd0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4974c031cb2fdf0b946ed0712ff6a50e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c7c261740ac2ae26715e1298ca278a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b312dab930cbbb9a4bb1a99f044dab73.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be2e2c0d4ac2bd79f6cea7a9b1a50662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4734735213b599a9915e1ed91a5d8ce4.png)
您最近一年使用:0次
3 . 如图,在直三棱柱
中,
,
,
,
,点
是棱
的中点.
平面
;
(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/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca036d049f5205cf04cb1b9c5cd03f97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c122ca7141c43c15c783968f5f0dbc19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02cb62f4c1e0e023619922eb8a509c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f62fd0b510920be6bc60d170c3ff3da3.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f62fd0b510920be6bc60d170c3ff3da3.png)
您最近一年使用:0次
2024-06-10更新
|
279次组卷
|
2卷引用:贵州省都匀市民族中学2023-2024学年高二上学期期中考试数学试题
4 . 如图,在四棱锥
中,
平面
,四边形
是矩形.
,E,F分别是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/13/ed420df5-4ddd-4817-bd47-e7e74cfc07bc.png?resizew=152)
(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/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6af49df89cfab0004253f26a77b8e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1f49222e9f127e6e1f85f7d4d327b8c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/13/ed420df5-4ddd-4817-bd47-e7e74cfc07bc.png?resizew=152)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6261790c66cc71ee3898afabad0c09f4.png)
您最近一年使用:0次
名校
解题方法
5 . 长方形
中,
,M是
中点(图1),将
沿
折起,使得
(图2),在图2中
平面
;
(2)在线段
上是否存点E,使得平面
与平面
的夹角为
,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c4e4a162f12d12a082b8d8fdd1aeab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f9fba8a4098c1a0515286eb8d616dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/804c0e2a375b5f4ff1c420532968efc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bb5012f6c70a1e98d682b6d021fadd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0760712e3e2ea02b755b751e760d0c55.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ddb7c2ca1b6bee86cb24fed02e40da2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d4a244bd6c29b79ddbf0bbdaf6cd14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15615de1a6df206dbd081251f676578e.png)
您最近一年使用:0次
2023-08-17更新
|
788次组卷
|
8卷引用:贵州省都匀兴华中学2023-2024学年高二上学期阶段测试(一)数学试题
贵州省都匀兴华中学2023-2024学年高二上学期阶段测试(一)数学试题辽宁省丹东市2018届高三上学期期末教学质量监测数学理试题重庆市渝北区松树桥中学校2019-2020学年高二上学期第一次段考考数学试题安徽省马鞍山市红星中学等3校2022-2023学年高二上学期期中联合调研数学试题河南省濮阳市2023-2024学年高二上学期9月大联考数学试题广东省湛江市雷州市第一中学2023-2024学年高二上学期第一次月考数学试题陕西省西安市长安区2023-2024学年高二上学期10月月考数学试题(已下线)期中真题必刷压轴60题(18个考点专练)-【满分全攻略】2023-2024学年高二数学同步讲义全优学案(人教A版2019选择性必修第一册)
解题方法
6 . 如图,在三棱柱
中,四边形
是边长为2的正方形,
.再从条件①:
;条件②:
;条件③:平面
平面
中选择两个能解决下面问题的条件作为已知,并作答.
(1)证明:
平面
;
(2)在第(1)问基础上,求直线BC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/6ac61c24f99a4e466f1e2ea011893866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19fc9f894312e55c87a0d6737080e233.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d399572bdc5816897500121034d1100c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/21/6811cb00-9664-4810-ad2b-37b4e8f21a82.png?resizew=146)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
(2)在第(1)问基础上,求直线BC与平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9539f8fb13345b449274b67bbda995db.png)
您最近一年使用:0次
14-15高三上·甘肃兰州·期中
名校
解题方法
7 . 设
,
,
均为正数,且
,证明:
(1)
;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/751e274e9107d780c39ba9c49d6daefb.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d689b0da0bd4803b3e8a6c69542ae466.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a3cfe361051dc5e9a3a36b2818db0.png)
您最近一年使用:0次
2023-06-19更新
|
1606次组卷
|
18卷引用:贵州省黔南州2023届高三上学期质量监测数学(文)试题
贵州省黔南州2023届高三上学期质量监测数学(文)试题贵州省黔南州2023届高三上学期10月质量监测数学(理)试题(已下线)2015届甘肃省兰州一中高三上学期期中考试理科数学试卷(已下线)2015届甘肃省兰州一中高三上学期期中考试文科数学试卷陕西省西安市长安区第一中学2018届高三上学期第八次质量检测数学(理)试题江西省南昌市八一中学、洪都中学、麻丘高中等七校2018-2019学年高二下学期期末考试数学(理)试题(已下线)2019年10月13日 每周一测-学易试题君之每日一题君2019-2020学年上学期高二数学人教版(必修5)(已下线)2019年10月13日 《每日一题》 必修5-每周一测福建省宁德市古田县玉田中学2020-2021学年高一上学期第一次月考数学试题(已下线)2.2 基本不等式-2021-2022学年高一数学尖子生同步培优题典(人教A版2019必修第一册)贵州省贵阳市2023届高三上学期质量检测数学(文)试题贵阳市2023届高三年级上学期质量监测数学(理)试题(已下线)2.2 基本不等式(精讲)-《一隅三反》(已下线)2.2 基本不等式(重难点突破)-【冲刺满分】(已下线)3.2基本不等式-高一数学同步精品课堂(北师大版2019必修第一册)(已下线)2.2 基本不等式(第1课时)(分层练习)-【上好课】(已下线)模块一 专题2 一元二次函数、方程和不等式1(人教A)(已下线)专题04 基本不等式压轴题-【常考压轴题】
8 . 如图,在直三棱柱
中,
,
,
,
分别是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/23/07bf3ef9-d316-4a47-92af-3a01c7cd520c.png?resizew=128)
(1)求证:
;
(2)求平面
与平面
的夹角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca38004c7744a7567bef30f0674fe60f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97e89a358226b4be8786077a60555c69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1032baaea5d4f8cb731df30bf346145f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/23/07bf3ef9-d316-4a47-92af-3a01c7cd520c.png?resizew=128)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce9ebc509c57beab91d0833dba1b2c6.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f20d8e192f6a75017da742890f3d39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb9b291d954b73034070eefd881b8bce.png)
您最近一年使用:0次
2022-08-22更新
|
382次组卷
|
4卷引用:贵州省黔南州2023届高三上学期摸底数学(理)试题
名校
解题方法
9 . 已知等差数列
的公差为
,
,若分别从下表第一、二、三行中各取一个数,依次作为
,
,
,且
,
,
中任何两个数都不在同一列.
(1)求数列
的通项公式;
(2)设
,数列
的前
项和为
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0afba6619728461766f9a23e35a74259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f65fc200f10b97588a0c9896277c9c64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f65fc200f10b97588a0c9896277c9c64.png)
第一列 | 第二列 | 第三列 | |
第一行 | 3 | 5 | 6 |
第二行 | 7 | 4 | 8 |
第三行 | 11 | 12 | 9 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dacbb62ffa53d9576c9e01b9ebdae9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.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/6828a1cf75f19bb74a0e0490bd65c168.png)
您最近一年使用:0次
2022-10-30更新
|
475次组卷
|
10卷引用:贵州省黔南州2023届高三上学期质量监测数学(文)试题
贵州省黔南州2023届高三上学期质量监测数学(文)试题贵州省黔南州2023届高三上学期10月质量监测数学(理)试题河北省石家庄市2022届高三一模数学试题河北省石家庄二中实验学校2021-2022学年高二下学期4月月考数学试题广东省广州市番禺中学2021-2022学年高二下学期期中数学试题(已下线)押新高考第18题 数列-备战2022年高考数学临考题号押题(新高考专用)(已下线)文科数学-2022年高考押题预测卷03(全国甲卷)贵州省贵阳市2023届高三上学期质量检测数学(文)试题贵阳市2023届高三年级上学期质量监测数学(理)试题(已下线)第四章 数列单元检测卷(知识达标)-【一堂好课】2022-2023学年高二数学同步名师重点课堂(人教A版2019选择性必修第二册)
名校
解题方法
10 . 已知向量
.
(1)求证:
三点共线.
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5339824070d6457ce3459522ccc2b4af.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a65183d238c9bc2be73770717d890683.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65df426520c01cae1e7f0f52cd712c06.png)
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5卷引用:贵州省黔南州罗甸县第一中学2022-2023学年高二上学期开学入学考数学试题