名校
解题方法
1 . 已知
.
(1)若
,求
;
(2)若
,
,
都为锐角,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ea9f7848c47a6ac3a1b55fcea429942.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f7e3c674336a90a38408bae2ec4c28f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5ff741ddf4211f6f20b63220bc8893.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f435efcc7869eec21bdba1ed81dc3f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9435dd49ec2c619d84681c290426e7d4.png)
您最近一年使用:0次
2021-11-11更新
|
690次组卷
|
3卷引用:2021年浙江省温州市摇篮杯高一数学竞赛试题
2 . 四面体,又叫三棱锥,是一种简单多面体.指空间两两不相交且不共线的四个平面在空间割出的封闭多面体.它有
个面、
个点、
条棱、
个二面角.若一个四面体的四个顶点
,
,
,
.则可记为四面体
.对下列特殊的四面体,请选择正确得选项( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
A.若四面体![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
B.若四面体![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
C.各面均为直接三角形且有至少三条棱长为![]() ![]() |
D.若一个平面与正四面体相交得到一个钝角三角形,则该钝角总小于![]() |
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3 . 在一次数学考试中,高三(1)班中的
位同学的成绩分别为
,
,
,
,
,
,
,
高三(2)班中的
位同学的成绩分别为
,
,
,
,
,
,
,
,则下列说法正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3304e23f3b0f9569c4140ca89b6498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c18ea011a4bce91e9f27c828b05b34eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e58ed6bdddbf22c0e8fa173adec76d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9740bae87cbcfb6d389145d64cfd42ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6f6b87e8a5301b439149a0181737e81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e15e398a06d8ffa9071cf32c3e9e73a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6f6b87e8a5301b439149a0181737e81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b765e032d24c1557ff29cb6f70be0a98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73057b576e2ddc315b90e4292e715c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3304e23f3b0f9569c4140ca89b6498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/459cc36d02d31815ba9f2d05e130e0cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfd121f4aeca8a78a320fca1fd1c4d07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cbcf82603580ddba4cfdb4efde85a8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e9ba3f640f57c0cece089dfd19b4970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2be88500e8054f3d9ef97c01a16fb75a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5df3451f880c2a1ba1c1901110bd1d25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2be88500e8054f3d9ef97c01a16fb75a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9740bae87cbcfb6d389145d64cfd42ba.png)
A.高三(1)班![]() ![]() |
B.高三(1)班![]() ![]() |
C.高三(1)班![]() ![]() |
D.高三(1)班![]() ![]() |
您最近一年使用:0次
4 . 小东同学参加一次答题活动,答题规则如下:本次答题共
道题,只有答对前
题,才能接下来答下一道题,答错题目,则答题结束;答对题目,则继续答下一题。若小东答题的准确率与题号成反比,且第一题的答题准确率
,小东至少答对两道题的准确率为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e5db9fa0bc36e2308bd3eecd5e78351.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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5 . 已知
,
为整系数多项式,若
,求
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17f26cade8fb52ae18a5258ec4e522e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b3a84b1415ba4e4ce47676b7a4f4f1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d9a5b3195e5f6fa70f47e5218c2d859.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17f26cade8fb52ae18a5258ec4e522e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b3a84b1415ba4e4ce47676b7a4f4f1d.png)
您最近一年使用:0次
6 . 将1~2020的数字按顺时针方向围成一个圆圈,然后从1开始,按顺时针依次隔一个数拿走,即拿走1,3,5,…,这个过程一直进行下去,直到剩下最后一个数字,则最后剩下的数字是___________ .
您最近一年使用:0次
7 . 设
,考虑一个含有
项的数列,其中每个数为0、-1或2.现将数列中的数两两相乘,再将这些乘积相加,这样得到的值为“和积值”.例如,取
,数列为0,-1,-1,2,那么乘积为
,
,
,
,
,
,和积值就为
.若一个数列含有2020项,则这个数列的最小和积值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9e5270c151c0c9de54dd93e9687372c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d51f9147b8265c0276c1f2c2659197.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc2d3df37e73a8abea815f37dbb3fff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/083e29d450e983dc5324fb1125bd7165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/083e29d450e983dc5324fb1125bd7165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc3b9e0c5796d964c0dcb7e5f6e8156a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cff028a1c8b062682400a5c66bf9d9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f3e33f3a8303606a6e4db783fee9c93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f3e33f3a8303606a6e4db783fee9c93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16c7e6d83d4088b72a36468947a35ed2.png)
您最近一年使用:0次
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8 . 如图所示,在单位正方体上有甲、乙两个动点,甲从
点匀速朝
移动;乙从
点匀速出发朝
移动,到达
后速度保持不变并折返.现甲、乙同时出发,当甲到达
时,乙恰好在到达
后折返到
,则在此过程中,甲、乙两点的最近距离为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6765a83140d745a6de4c85d9b6b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a42da28be159399514cc6179a96e34b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a42da28be159399514cc6179a96e34b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6765a83140d745a6de4c85d9b6b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a42da28be159399514cc6179a96e34b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/6/ad1e6bc1-8f77-49d8-a008-1cb5fd0350f7.png?resizew=161)
您最近一年使用:0次
2021-09-16更新
|
359次组卷
|
3卷引用:2020年浙江省数学夏令营试题
2020年浙江省数学夏令营试题(已下线)第07讲 基本立体图形与直观图(核心考点讲与练)-2021-2022学年高一数学考试满分全攻略(人教A版2019必修第二册)江苏省盐城中学2022-2023学年高一创新班下学期3月月考数学试题
解题方法
9 . 已知十进制九位数
,则所有满足
,
的九位数的个数为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b141677a53f3f062307f3d1c58ecdf71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/991544df73bffc3e5f97e1ec064f45a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/547d9ed90bed240f398d61a797449817.png)
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10 . 若平面上的点
满足
.
(1)求
的最大值;
(2)设向量
,
,定义运算
.若
,求
的取值范围.(其中О为坐标原点)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/468f2063edc38fdae95c4e7120d00c6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66f345f432276db3a164997d9f011ce.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c797a24dfff093f0afb5bd8f09919293.png)
(2)设向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e02a2530966362c93c56617f448f449c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6106eb3b2d8bc8271a13396a37c0b729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa8f2517f6c2fc5fa0207bd715af63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef157216298d028b940b745ea1ddd694.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/410cfca204e3297c6d938d5776fb602d.png)
您最近一年使用:0次