解题方法
1 . 如图,在几何体
中,△ABC是边长为2的正三角形,D,E分别是
,
的中点,
,
平面ABC,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/7/5eb51012-dd4e-4a0c-aa7c-a1025a264a4c.png?resizew=146)
(1)若
,求证:
平面
;
(2)若平面
与平面ABC夹角的余弦值为
,求直线DE与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5ed434785aeba443e99a7e8238eb16c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fd4c85bb98a2a0afddd7ed92578ad2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d519fa7713f99e8e4ed2b47e477c6715.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a8bfe2553e852df73185d017c0a62fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/462b1c65b1b233ab98a90c164c0968c7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/7/5eb51012-dd4e-4a0c-aa7c-a1025a264a4c.png?resizew=146)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89eac4972d99833acf112d298c6c508b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07b7903de4be7d5dc1175cfbf6e8da9f.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07b7903de4be7d5dc1175cfbf6e8da9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/072c32b9948144d040a9a83f8d11ea8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07b7903de4be7d5dc1175cfbf6e8da9f.png)
您最近一年使用:0次
2023-12-15更新
|
293次组卷
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3卷引用:山西省太原市2024届高三上学期期中数学试题
2 . 已知等差数列
的前n项和为
,
,
,数列
满足
,
.
(1)求
的通项公式;
(2)设数列
满足
,若
的前n项和为
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/033fd16b5cffcaf285d28d7583e0ff3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b72ddd7de598464a37b10f03f67b904.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0ce1a0815e84c82544abd418572f4b6.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a89018baf5e950b99d0f1d3a48f6d688.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2caf8c4806569a493c79902a617f4c2e.png)
您最近一年使用:0次
2023-11-23更新
|
1199次组卷
|
4卷引用:山西省太原市成成中学校2023-2024学年高二下学期4月月考数学试题
山西省太原市成成中学校2023-2024学年高二下学期4月月考数学试题山东省临沂市2023-2024学年高三上学期期中考试数学试题新疆克拉玛依市第十三中学2024届高三上学期12月月考数学试题(已下线)第四章 数列(压轴题专练,精选28题)-2023-2024学年高二数学单元速记·巧练(人教A版2019选择性必修第二册)
名校
解题方法
3 . 已知函数
.
(1)证明:
在
上单调递减;
(2)求不等式
的解集.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb3eb788a8a86085979ea02c46703a85.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
(2)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6228686cc1b12114b355d02a3877843f.png)
您最近一年使用:0次
2024-03-26更新
|
108次组卷
|
2卷引用:山西省太原师范学院附属中学2023-2024学年高一下学期3月质量检测数学试题
解题方法
4 . 已知函数
.
(1)若
在
上单调递增,求
的取值范围;
(2)若
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f89f6abd0559eb5f73ea8def02c4ad3.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5d6243e93c41978871cb23d8e66148d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbda14cde6775551f226484a18cdbaff.png)
您最近一年使用:0次
2023-10-30更新
|
450次组卷
|
6卷引用:山西省太原市师苑中学校2023-2024学年高三下学期第二次月考数学试题
名校
解题方法
5 . 已知函数
是定义在
上的奇函数,且
.
(1)求
的值;
(2)判断
在
上的单调性,并用单调性定义证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d572c668d88dbdcc79e917f0d666a729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d188ec2580e273ce87e51653a2177ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70dfd3b70aab0849a459a241d904aa73.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
(2)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d188ec2580e273ce87e51653a2177ee.png)
您最近一年使用:0次
13-14高二下·山西·阶段练习
名校
6 . 如图,在
中,
,斜边
可以通过
以直线
为轴旋转得到,且二面角
是直二面角,动点
在斜边
上.
平面
;
(2)求
与平面
所成角的正弦的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c633830c6e2ac6d8d6e18890ef5ee33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b10a7cfa7063078668323401b0084cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07ee84bb69b77fa99dfac07dfb0d38a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c633830c6e2ac6d8d6e18890ef5ee33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a19c1bcb8431ae315ecd29c6478d3eff.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/95a55c40bb7437081d8e669974c8d1b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a77343ecde1c2665df291761b6563.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a77343ecde1c2665df291761b6563.png)
您最近一年使用:0次
2023-09-14更新
|
331次组卷
|
14卷引用:山西省大学附属中学校2019-2020学年高二上学期期中数学(文)试题
山西省大学附属中学校2019-2020学年高二上学期期中数学(文)试题(已下线)2013-2014学年山西大学附中高二第二学期月考文科数学试卷2019年安徽省芜湖市第一中学高三上学期基础检测数学试题(已下线)专题8.3 空间点、直线、平面之间的位置关系(练)-浙江版《2020年高考一轮复习讲练测》山西省山西大学附属中学校2019-2020学年高二上学期期中数学(理)试题(已下线)专题8.3 空间点、直线、平面之间的位置关系(精练)-2021年新高考数学一轮复习学与练(已下线)专题8.3 空间点、直线、平面之间的位置关系(练)-2021年新高考数学一轮复习讲练测(已下线)专题8.3 空间点、直线、平面之间的位置关系(练)- 2022年高考数学一轮复习讲练测(新教材新高考)黑龙江省大庆市大庆中学2021-2022学年高一下学期期末考试数学试题黑龙江省大庆外国语学校2023-2024学年高二上学期开学质量检测数学试题(已下线)高一下学期期末真题精选(压轴60题20个考点专练)-【满分全攻略】2022-2023学年高一数学下学期核心考点+重难点讲练与测试(人教A版2019必修第二册)(已下线)第12讲 8.6.2直线与平面垂直的判定定理(第1课时)-【帮课堂】(人教A版2019必修第二册)(已下线)第八章 立体几何初步 单元复习提升(易错与拓展)(2)-单元速记·巧练(人教A版2019必修第二册)(已下线)8.6.3平面与平面垂直——课堂例题
名校
解题方法
7 . 如图,在三棱柱
中,底面是边长为2的等边三角形,在菱形
中,
,
,平面
平面
,
,
分别是线段
、
的中点.
(1)求证:
平面
;
(2)若点
为棱
的中点,求点
到平面
的距离;
(3)若点
为线段
上的动点(不包括端点),求锐二面角
的余弦值的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93375ca41cdaac319b79f05108f7fc24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/462b1c65b1b233ab98a90c164c0968c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61cdaadeae37736a1e6dd93fa1fe712f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/13/736a71f2-6cd9-49b7-88cb-4c36eab52e01.png?resizew=164)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d26d8a9d64ad3c8cba28840b41ed7837.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ac0983ef8333a915498585f216860c.png)
您最近一年使用:0次
2023-09-10更新
|
715次组卷
|
3卷引用:山西大学附属中学校2023-2024学年高二上学期10月模块诊断数学试题
解题方法
8 . 如图,在直三棱柱
中,
,
,
分别是
,
的中点.
(1)求证:
平面
;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeed487430a5b8a330f2d0c52166521a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/6/9e2a7bf6-50c0-4cbb-83b4-fdda49c74f1c.png?resizew=126)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/063510e3c1fb6a7ccc3b8e3e3c7d660e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2e5dc81fbafbe58bff0842f7776d80a.png)
您最近一年使用:0次
2023-07-03更新
|
886次组卷
|
3卷引用:山西省太原市2022-2023学年高一下学期期末数学试题
解题方法
9 . 如图,四面体OABC各棱的棱长都是1,
是
的中点,
是
的中点,记
.
(1)用向量
表示向量
;
(2)利用向量法证明:
.
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/352afb2166bc2d282d55bd7bba4388e7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/21/69f241eb-bce4-4006-b7c2-d6b3c14f35f7.png?resizew=165)
(1)用向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46fddc1f1c50aab4de7fff286d691b97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21909dd065ccc349a2cbfd4c3cf4976b.png)
(2)利用向量法证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/178e3fa2e4de57a4c067e79be7d798e7.png)
您最近一年使用:0次
2023-11-23更新
|
207次组卷
|
3卷引用:山西省太原市2023-2024学年高二上学期期中学业诊断数学试卷
解题方法
10 . 已知函数
,
.
(1)当
时,证明:
;
(2)当
,若
恒成立,求实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ad3da8a9798cf59dc08d553e342979e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc3e321b0932323e063aa03470db808b.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66692ec49a458f9e48c7315d03dfc37b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09b54cd1f5049fb1bce10df37985efdc.png)
您最近一年使用:0次
2023-11-15更新
|
337次组卷
|
4卷引用:山西省太原市2024届高三上学期期中数学试题
山西省太原市2024届高三上学期期中数学试题广东省揭阳市惠来同仁北实高级中学2024届高三上学期期中学业诊断数学试题(已下线)模块三 大招14 恒成立求参——必要性探路(已下线)2024年新课标全国Ⅰ卷数学真题平行卷(基础)