1 . 如图1,在矩形
中,
,
是
与
的交点,将
沿BE折起到图2中
的位置,得到四棱锥
.
平面
;
(2)若
,求三棱锥
的体积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9117c8ff9ae3f39738feca777d58ad6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdfe7976bd3f16bfef5c6f1b4f20f23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2db2b1c641b93caae9b7a82441e4ba70.png)
图1 图2
(1)证明:平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48dc57896ec5163988cb2dfa6e36e123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1eddaf3f33bd9a99162c061c9dd99aee.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0dbac92660844ecbc44386e80f4b577.png)
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2 . 如图,在三棱锥
中,
平面PAB,E,F分别为BC,PC的中点,且
,
,
.
.
(2)求二面角
的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bae7599ad243c12d94325ad917f0a44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80de8656637bb7102f8111c172add996.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bafa8c14100a4f847b41b9148954116c.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f726924c16c769a012d7a111f81e44e7.png)
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2024-06-07更新
|
1737次组卷
|
5卷引用:第11章:立体几何初步章末综合检测卷(新题型)-【帮课堂】(人教B版2019必修第四册)
(已下线)第11章:立体几何初步章末综合检测卷(新题型)-【帮课堂】(人教B版2019必修第四册)辽宁省东北育才学校双语校区2023-2024学年高一下学期期中考试数学试题(已下线)6.5.2 平面与平面垂直-同步精品课堂(北师大版2019必修第二册)陕西省安康市高新中学2023-2024学年高一下学期6月月考数学试题(已下线)专题06 空间角、距离的计算-期末考点大串讲(苏教版(2019))
名校
3 . 一个平面截正方体所得的截面图形可以是( )
A.等边三角形 | B.正方形 | C.梯形 | D.正五边形 |
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4 . 在正方体
中,
为
的中点,则直线
与直线
所成角的余弦值为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
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5 . 已知在正三棱台
中,
分别为棱
的中点,平面
、平面
与平面
交于点
.记
和
分别表示三棱锥
和三棱锥
的体积,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e68300e9ff6b6ea7943bdd2b3658b2c.png)
____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8dff0b92d9c79e26602bd28455d705a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1921b3559a5f73426f0d78e401ecc75b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20af148464904e21f4374cc8fb886fba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4764374bd2fb78e59cd0b283637baeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63055a5d6916f99d07fede49120753f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4278c0911e7df78965e78cff69cac5f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d39e8a65bdb732cea1eef3820e522f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e68300e9ff6b6ea7943bdd2b3658b2c.png)
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6 . 如图,在三棱柱
中,
,
,
,
分别为
,
,
,
的中点,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
A.![]() ![]() ![]() ![]() | B.![]() |
C.![]() ![]() ![]() | D.![]() |
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7 . 已知m,n是两条不同的直线,
,
是两个不重合的平面,则下列命题正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
A.若![]() ![]() ![]() ![]() | B.若![]() ![]() ![]() ![]() |
C.若![]() ![]() ![]() ![]() | D.若![]() ![]() ![]() ![]() |
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8 . 如图所示的平面图形可以折叠成的立体图形为( )
A.三棱锥 | B.四棱柱 | C.四棱锥 | D.球 |
您最近一年使用:0次
2024-06-07更新
|
539次组卷
|
3卷引用:第11章:立体几何初步章末综合检测卷(新题型)-【帮课堂】(人教B版2019必修第四册)
(已下线)第11章:立体几何初步章末综合检测卷(新题型)-【帮课堂】(人教B版2019必修第四册)重庆市涪陵第五中学校2023-2024学年高一下学期第一次月考数学试题陕西省宝鸡市扶风县法门高中2023-2024学年高一下学期期中考试数学试卷
名校
9 . 某企业使用新技术对某款芯片制造工艺进行改进.部分芯片由智能检测系统进行筛选,其中部分次品芯片会被淘汰,筛选后的芯片及未经筛选的芯片进入流水线由工人进行抽样检验.记
表示事件“某芯片通过智能检测系统筛选”,
表示事件“某芯片经人工抽检后合格”.改进生产工艺后,该款芯片的某项质量指标
服从正态分布
,现从中随机抽取
个,这
个芯片中恰有
个的质量指标
位于区间
,则下列说法正确的是( )(若
,
)
![](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/5b734e8f1546481e3eb4976008a045de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33b6329846cb6ea154d7664bdb405960.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b734e8f1546481e3eb4976008a045de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecf693507874a4f0ad48589cef188b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a5b4fbf10f7c293ee1810bfa26d6877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a597372e55596aa8b8d5f2fdf80e6b03.png)
A.![]() |
B.![]() |
C.![]() |
D.![]() ![]() |
您最近一年使用:0次
2024-06-04更新
|
1247次组卷
|
8卷引用:第8章 概率单元综合能力测试卷-【帮课堂】2023-2024学年高二数学同步学与练(苏教版2019选择性必修第二册)
(已下线)第8章 概率单元综合能力测试卷-【帮课堂】2023-2024学年高二数学同步学与练(苏教版2019选择性必修第二册)单元测试B卷——第七章 随机变量及其分布湖南省长沙市第一中学2023-2024学年高三下学期2月开学考试数学试卷(已下线)7.5 正态分布(分层练习,8大题型)-2023-2024学年高二数学同步精品课堂(人教A版2019选择性必修第三册)(已下线)专题09 计数原理与随机变量及分布列(讲义)重庆市乌江新高考协作体2023-2024学年高二下学期第一阶段学业质量联合调研抽测(4月)数学试题江苏省决胜新高考2024届高三下学期4月大联考数学试题重庆市涪陵第五中学校2024届高三下学期第二次适应性考试数学试题
23-24高二下·全国·单元测试
10 .
网络是第五代移动通信网络的简称,是新一轮科技革命最具代表性的技术之一.
年初以来,我国
网络正在大面积铺开.A市某调查机构为了解市民对该市
网络服务质量的满意程度,从使用了
手机的市民中随机选取了
人进行了问卷调查,并将这
人根据其满意度得分分成以下
组:
、
、
、
、
,统计结果如图所示:
市市民对
网络满意度得分
(单位:分)近似地服从正态分布
,其中
近似为样本平均数
,
近似为样本的标准差
,并已求得
.若
市恰有
万名
手机用户,试估计这些
手机用户中满意度得分位于区间
的人数(每组数据以区间的中点值为代表);
(2)该调查机构为参与本次调查的
手机用户举行了抽奖活动,每人最多有
轮抽奖活动,每一轮抽奖相互独立,中奖率均为
.每一轮抽奖,若中奖,奖金为
元话费且继续参加下一轮抽奖;若未中奖,则抽奖活动结束,现小王参与了此次抽奖活动.
(ⅰ)求小王获得
元话费的概率;
(ⅱ)求小王所获话费总额
的数学期望(结果精确到
).
参考数据:若随机变量z服从正态分布
,即
,则
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84029954b75b305b237c4872db1d4eb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/701554763bdbbf2689a8dae07608da38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84029954b75b305b237c4872db1d4eb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84029954b75b305b237c4872db1d4eb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84029954b75b305b237c4872db1d4eb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90dd550e1ad9bbf01687ffb4aab788ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90dd550e1ad9bbf01687ffb4aab788ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64fc138be9688253cbdeae2808eb74ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/486c7705dbd7b7b9ec5dd17b4891088b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea146d8ec45e63ad14683fd31064de66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef1a32a9f2b04fc931c6a0da0b7485e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47248d88a8876e1177cbd3ba43b11bea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdfc26b8bdcd1fd3781c4593217c725e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1100379a4385b9ce064847bc21760adc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfbe7f95b5d89f9409ec24536da9e826.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c0ad7e7853a069537387b5192f73844.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5873c01192b7d33b7483f444f90b5b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d659d74275842d7d1b590edd9ec5479e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84029954b75b305b237c4872db1d4eb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84029954b75b305b237c4872db1d4eb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cbf829e847b2ea353fe5de179c32f16.png)
(2)该调查机构为参与本次调查的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84029954b75b305b237c4872db1d4eb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07ae0b4264da6a8812454ffd2f20d94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0efba7147f5b9ced8bc4a72f0a9fb8af.png)
(ⅰ)求小王获得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/def7f5a19d0608e6bb2ddaaea5a0c965.png)
(ⅱ)求小王所获话费总额
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e2c4d12b3a705daab723ab243b6cc88.png)
参考数据:若随机变量z服从正态分布
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdfc26b8bdcd1fd3781c4593217c725e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e0a11f0d9d949d0ecd39c7f0903672.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef68528b10f467b68130f2fd1a5d8ea1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20935e26e360e05b52e580a93abd9538.png)
您最近一年使用:0次