名校
1 . 棱长为
的正方体
中,
为棱
的中点,
为正方形
内一个动点(包括边界),且
平面
,则当三棱锥
体积取最大时,其外接球的表面积为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71a73120cd0988eb4a63436e7a4b9470.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43ea211a573491409cb60f9fbe9a65cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/923189afc198d153c79059a827f63c87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/640aa89f8c302356d2dfe5ccf7c054b0.png)
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2 . 已知实数
,满足
,则
的最小值为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a14c388e1e2e5a2ff1ccf6caffbee0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/819060769d52da4b87df58dfd7490fdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ab3c5261469d69d9d079221a349be85.png)
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2024-05-12更新
|
1135次组卷
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3卷引用:模块五 专题6 全真拔高模拟6(苏教版高二期中研习)
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3 . 在三棱锥
中,
,
平面
,点M是棱
上的动点,点N是棱
上的动点,且
.
![](https://img.xkw.com/dksih/QBM/2024/1/30/3422378703052800/3432026374717440/STEM/d16a09eff99f4f52b2501b3b39b7caac.png?resizew=200)
(1)当
时,求证:
;
(2)当
的长最小时,求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74375e1ba9d3a5d373479874b6634e96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f1897a7e856b42f8cee0f286ad913d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdc281ca213b922e5c4bddafd4ef08df.png)
![](https://img.xkw.com/dksih/QBM/2024/1/30/3422378703052800/3432026374717440/STEM/d16a09eff99f4f52b2501b3b39b7caac.png?resizew=200)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d94188fea61c347a150744709920d96e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66fae8e33cd86fa8dab72704eaafe1ba.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1885efcff0b903e314057dd153578600.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70db40c42655327adee01caedfc9d50c.png)
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2024-03-12更新
|
395次组卷
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6卷引用:浙江省温州市瑞安中学2022-2023学年高二下学期期中数学试题
名校
解题方法
4 . 在三棱锥
中,
,
,且
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70734a8e672376bb0bd1522e229f86a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1667a482b4cc485d2db75bd13187e8a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55496a010eaba9ba50e7ad8136a16de1.png)
A.当![]() ![]() ![]() |
B.当![]() ![]() ![]() ![]() |
C.![]() ![]() |
D.三棱锥![]() ![]() |
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2023-11-02更新
|
844次组卷
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3卷引用:云南省昆明市云南师范大学附属中学2023-2024学年高二上学期期中考试数学试题
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解题方法
5 . 《九章算术》中将底面为直角三角形且侧棱垂直于底面的三棱柱称为堑堵.在堑堵
中,若
,点
是直线
上的动点,则
到直线
的最短距离是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18b209ba5f8c9b0f282e1ae67a84a376.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/5/eb281c7f-a13c-47d8-9e33-3174e93431be.png?resizew=151)
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2023-10-17更新
|
300次组卷
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3卷引用:北京市顺义区第二中学2023-2024学年高二上学期期中考试数学试题
北京市顺义区第二中学2023-2024学年高二上学期期中考试数学试题北京市顺义牛栏山第一中学2023-2024学年高二上学期10月月考数学试题(已下线)第3章 空间向量及其应用(知识归纳+题型突破)-2023-2024学年高二数学单元速记·巧练(沪教版2020选择性必修第一册)
名校
6 . 已知点
,则点
到
轴的距离为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f539f1efe82aadac969bdfb5e0b08d3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
A.3 | B.5 | C.![]() | D.![]() |
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2023-08-14更新
|
539次组卷
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3卷引用:广东省广州市培英中学2023-2024学年高二上学期期中数学试题
广东省广州市培英中学2023-2024学年高二上学期期中数学试题河南省驻马店市2022-2023学年高二下学期第三次联考数学试题(已下线)1.3 空间向量及其运算的坐标表示(分层练习)-2023-2024学年高二数学同步精品课堂(人教A版2019选择性必修第一册)
解题方法
7 . 如图,在正方体
中,
为棱
的中点.动点
沿着棱
从点
向点
移动,对于下列四个结论:
(1)存在点
,使得
;(2)存在点
,使得
平面
;(3)
的面积越来越小;(4)四面体
的体积不变. 其中所有正确的结论的序号是__________ .
![](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/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/27/74502eb1-eadf-4895-9ea6-3c60af11313d.png?resizew=159)
(1)存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/656aceec19543470bd58ed3d304d155d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4645450a006f2c20087486d0833afbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e1e007fb94902451b22b4e15fe06b08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb9be27ba360bc78bf45fd5a22e4f781.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6738d05f0c7e4f0076fd5c094a4fb51c.png)
您最近一年使用:0次
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解题方法
8 . 如图在长方体
中,
,E,F,G分别是
棱的中点,P是底面
内一个动点,若直线
平面
平行,则线段
的最小值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/14/c218e066-ca63-44ab-9507-abe77efc3d4c.png?resizew=169)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7de1864216bf2fb8a58b23a8379d586.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e21de25a662ba9e513dee5d6e34cb237.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff55f4780bb3fb376c9a04dbfbb1d989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe8a84ca3a13f82aff1a022edc66065.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/14/c218e066-ca63-44ab-9507-abe77efc3d4c.png?resizew=169)
A.![]() | B.1 | C.![]() | D.![]() |
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2023-04-13更新
|
409次组卷
|
4卷引用:福建省福州第三中学2022-2023学年高二下学期期中适应性练习数学试题
福建省福州第三中学2022-2023学年高二下学期期中适应性练习数学试题海南省文昌市文昌中学、华迈实验中学2023-2024学年高二上学期期中段考数学试题广东省揭阳市普宁国贤学校2023届高三下学期4月模拟数学试题(已下线)第06讲 1.4.2用空间向量研究距离、夹角问题(3)
名校
解题方法
9 . 在三棱锥
中,
,
,
,二面角
的大小为
.若三棱锥
的所有顶点都在球O的球面上,则当三棱锥
的体积最大时,球O的体积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbb05b8b630052ff544249ebd72d95d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/364d6c88726d8c3bb8ed297057332bac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/526908dfb46cf151b8ab1492a9d52047.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47d294d69caac577339f11f477b2047e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/290710d643ab6cd3b9edd73815b1d8ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-04-08更新
|
1574次组卷
|
7卷引用:山东省聊城市2023届高三下学期期中数学试题
山东省聊城市2023届高三下学期期中数学试题山东省聊城市2023届高三第三次学业质量联合检测数学试题湖北省随州市第一中学、荆州市龙泉中学2023届高三下学期四月联考数学试题(已下线)押新高考第6题 立体几何专题14空间向量与立体几何(单选填空题)(已下线)模块六 专题3 易错题目重组卷(湖北卷)广东省广州市从化区从化中学2023届考前仿真模拟3数学试题
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10 . 若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cc193f1d27c0cd5cb2ad1791e7d0a2c.png)
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80b97ab3b66712c79b788f21ec005e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cc193f1d27c0cd5cb2ad1791e7d0a2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a47fb9a23ccaa593913a324ca146e0a.png)
A.![]() | B.3 | C.![]() | D.4 |
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2023-08-06更新
|
499次组卷
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4卷引用:浙江省温州市环大罗山联盟2022-2023学年高二上学期期中联考数学试题