名校
解题方法
1 . 在棱长为1的正方体
中,
为底面
的中心,
是棱
上一点,且
,
,
为线段
的中点,给出下列命题:
①
,
,
,
四点共面;
②三棱锥
的体积与
的取值有关;
③当
时,
;
④当
时,过
三点的平面截正方体所得截面的面积为
.
其中正确的有______ (填写序号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0424446817f60c18f8e4e3cc202ad99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfa920e346a3d79b7ecfa395b8e72b1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee72261f6901e62dfd0ffe547406544.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/16/137312de-792b-4a5b-9b8b-846be4283e38.png?resizew=162)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
②三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9933c392d85e51aba78e72468363579b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
③当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61c1eccad7857ccae05562abaaf10d25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/558e11d700481dc414d5d073b4b88a3d.png)
④当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3cf0f585938ede9eca890a6eb326d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4aee887d79c104f7d37fafa312aef6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58edfa8a9009058dfa6c9f1b2b8c8018.png)
其中正确的有
您最近一年使用:0次
2023-10-01更新
|
255次组卷
|
3卷引用:北京市日坛中学2023-2024学年高二上学期期中考试数学试题
北京市日坛中学2023-2024学年高二上学期期中考试数学试题(已下线)高二数学上学期期中模拟卷01(前三章:空间向量与立体几何、直线与圆、圆锥曲线)-2023-2024学年高二数学同步精品课堂(北师大版2019选择性必修第一册)四川省通江中学2022-2023学年高二上学期期中文科数学试题
解题方法
2 . 现有如下命题:
①若
的展开式中含有常数项,且n的最小值为10;
②
;
③若有一个不透明的袋子内装有大小、质量相同的6个小球,其中红球有2个,白球有4个,每次取一个,取后放回,连续取三次,设随机变量
表示取出白球的次数,则
;
④若定义在R上的函数
满足
,则
的最小正周期为8.
则正确论断有__________ .(填写序号)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99cd2ce1ccd251c09cc123fa0b3493fd.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2f1e02b27ef0953ed4f88863f10ef4f.png)
③若有一个不透明的袋子内装有大小、质量相同的6个小球,其中红球有2个,白球有4个,每次取一个,取后放回,连续取三次,设随机变量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c92278194f93b54876e6b319995f5a37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e730f59a2af75888cbdd95d383cc7a.png)
④若定义在R上的函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bacebd0ecba599d14456e23734c68860.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
则正确论断有
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3 . 某综合性大学数学系为了提高学生的数学素养,开设了“古今数学思想”“世界数学通史”“几何原本”“什么是数学”四门选修课程,要求每位学生从大一到大三的三个学年内将四门选修课程全部修完,且每学年最多选修两门,若同一学年内选修的课程不分前后顺序,则每位学生共有______ 种不同的选修方式可选.(用数字填写答案)
您最近一年使用:0次
2023-03-24更新
|
2005次组卷
|
5卷引用:山东省聊城市2023届高三下学期第一次模拟数学试题
解题方法
4 . 如图,若正方体的棱长为2,点P是正方体
的上底面
上的一个动点(含边界),E,F分别是棱BC,
上的中点,有以下结论:
①△PAE在平面
上的投影图形的面积为定值;
②平面AEF截该正方体所得的截面图形是五边形;
③
的最小值是
;
④三棱锥P-AEF体积的最小值为
.
其中正确的是________ .(填写所有正确结论的序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
①△PAE在平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b724168afaee2ecddf97257180be18.png)
②平面AEF截该正方体所得的截面图形是五边形;
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08204b03bc91a4218d3eff5843002fb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01961669cd597f61fa48e9853d678bb8.png)
④三棱锥P-AEF体积的最小值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
其中正确的是
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/15/ec976578-787d-44d8-ac67-b3ca5b810fe0.png?resizew=183)
您最近一年使用:0次
名校
5 . 如图,多面体
中,面
为正方形,
平面
,
,且
,
,
为棱
的中点,
为棱
上的动点,有下列结论:
①当
为
的中点时,
平面
;
②存在点
,使得
;
③当
为
的中点时,直线GH与BE所成角的余弦值为
;
④三棱锥
的外接球的表面积为
.
其中正确的结论序号为______ .(填写所有正确结论的序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1019c0405370c673e37b46c066eba839.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09c7e72ef83184b96b12a51daf32c220.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95893879ed5feeef3cb2cf68a1a88632.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3362a45b72536c714c5107b0ae94f1c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/22/b4af39c4-b247-4220-b17e-46dd0451f435.png?resizew=164)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4193fb98c610f41f9a6c89d046f13d32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d09072f5be97caf5e942ae8fc16b0bf.png)
②存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d3f8b5c2dba20d42a8c551cd75a38fe.png)
③当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24c14ff9b66f21c05e52dc3c8908c2df.png)
④三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f26712d1a7a5864cd18498f16f7bd96c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e95a79288fcb7e47fba4410722e2bc6.png)
其中正确的结论序号为
您最近一年使用:0次
名校
解题方法
6 . 李老师在黑板上写下一个等式
,请同学们在两个括号内分别填写两个正数,使得等号成立,哪个同学所填的两个数之和最小,则该同学获得“优胜奖”.小明同学要想确保获得“优胜奖”,他应该在前一个括号内填上数字________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/713a7363b4ea3c93853b62a5bcd5cdb1.png)
您最近一年使用:0次
2023-01-16更新
|
288次组卷
|
5卷引用:云南省昆明市第十中学2023-2024学年高一上学期九月月考数学试题
7 . 著名数学家华罗庚先生曾说过:“数缺形时少直观,形缺数时难入微,数形结合百般好,隔裂分家万事休.”在数学的学习和研究中,我们经常用函数的图象来研究函数的性质,也经常用函数的解析式来琢磨函数的图象特征,如某体育品牌的LOGO为
,可抽象为如图所示的轴对称的优美曲线,下列函数中,其图象大致可“完美”局部表达这条曲线的函数是________ ;(填写你认为正确的序号)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/c25c2aeb-c2cc-4702-9e84-e4fc301029e6.png?resizew=155)
①
;②
③
;④
;
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/0484f69c-dc10-4efd-b71d-7af642a4fc10.png?resizew=79)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/c25c2aeb-c2cc-4702-9e84-e4fc301029e6.png?resizew=155)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e216bdc7d572c8c800bf84097678950c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6f2f533b90dd4a2811dadaaa3918139.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad40d3453dbba02276a3da401db33031.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da6648f993400fde23ffa874e8a8fc30.png)
您最近一年使用:0次
名校
解题方法
8 . 中国古代数学名著《九章算术》中,将四个面都为直角三角形的三棱锥称之为“鳖臑”,若三棱锥
为鳖臑,
平面
,
,
,则结论正确的序号是______ .(填写序号即可)
①
平面
;
②直线
与平
所成角的正弦值为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5ec70bc9d4f8f5df312e2f09ee3bcb5.png)
③二面角
的余弦值为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3fa3ba9c03ed22792d22d01518fcf40.png)
④三棱锥
外接球的表面积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/491c3a4f72b84ebadd28b90711435adc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/209acf15985d1ea1ad86fc4a37e38c0b.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
②直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5ec70bc9d4f8f5df312e2f09ee3bcb5.png)
③二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b33b7213d99a817bff19bcf740a0697c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3fa3ba9c03ed22792d22d01518fcf40.png)
④三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f1dd170ff8de46ede27254c7b70f2f.png)
您最近一年使用:0次
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解题方法
9 . 已知双曲线
,现有如下条件:①双曲线C的焦距为6;②焦点到其中一条渐近线的距离为2;③与椭圆
共焦点.从上述三个条件中任选一个作为条件,得到双曲线C的方程为________ .(只填写一个条件的结果即可)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2466df942b497e0bac8fc3e724fbe489.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41c42a46f892dc84d8999396f93e59a3.png)
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解题方法
10 . 声音是由物体振动而产生的声波通过介质(空气、固体或液体)传播并能被人的听觉器官所感知的波动现象.在现实生活中经常需要把两个不同的声波进行合成,这种技术被广泛运用在乐器的调音和耳机的主动降噪技术方面.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/11/d9814e53-4c3b-4469-a796-22116c64e6a3.jpg?resizew=229)
(1)若甲声波的数学模型为
,乙声波的数学模型为
,甲、乙声波合成后的数学模型为
.要使
恒成立,则
的最小值为__________ .
(2)技术人员获取某种声波,其数学模型记为
,其部分图象如图所示,对该声波进行逆向分析,发现它是由
两种不同的声波合成得到的,
的数学模型分别记为
和
,满足
.已知
两种声波的数学模型源自于下列四个函数中的两个.
①
;
②
;
③
;
④
.
则
两种声波的数学模型分别是__________ .(填写序号)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/11/d9814e53-4c3b-4469-a796-22116c64e6a3.jpg?resizew=229)
(1)若甲声波的数学模型为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c6deadc9c10cf84d7e75d8f3e724cce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e04e765093735a038f2fb73b1b331c87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd67b594f222d83c217262f94089ddc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c419949314258c61e4436e16477fa42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6581916f5a65edfea257c804efee007e.png)
(2)技术人员获取某种声波,其数学模型记为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26e91406484c332ac8fc96a54c7e187b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3637753af5ce86be9c23a9beb6b5067.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3637753af5ce86be9c23a9beb6b5067.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2709ca478fb15ea08e8aa55328eae8e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a82a1224e47f31ecdfffd328d5a3ab6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f00ecf2d6e740e11033b3fb626bda271.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3637753af5ce86be9c23a9beb6b5067.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b74da0e7338e9bc1fcfbd08734adbebe.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22f6e7e58af643bc8c77f4c52bef281c.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b50f0aa0a199b9ef4bc9eb0e909b4f6f.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e58f2c37bf3290457ee9b465fa5975a2.png)
则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3637753af5ce86be9c23a9beb6b5067.png)
您最近一年使用:0次