名校
解题方法
1 . 已知
是单位向量,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f275a75246b5be5cf179f81267d53f1.png)
在
上的投影向量为
,则
与
的夹角为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dc64abe49847ade9b78678ba1f8e0e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f275a75246b5be5cf179f81267d53f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/169143072a2c2a0ea7062d65735de1d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dc64abe49847ade9b78678ba1f8e0e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a250997f723ab4ccff9d91e0d810fed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dc64abe49847ade9b78678ba1f8e0e2.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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7日内更新
|
273次组卷
|
5卷引用:6.2.4 向量的数量积——课后作业(提升版)
(已下线)6.2.4 向量的数量积——课后作业(提升版)湖北省新高考联考协作体2024届高三下学期2月收心考试数学试题江苏省无锡市辅仁高级中学2023-2024学年高一下学期期中考试数学试题(已下线)广东省深圳市深圳中学2024届高三二轮四阶测试数学试题江苏省无锡市辅仁高级中学2023-2024学年高二下学期期中考试数学试题
24-25高一上·全国·课后作业
2 . 请将以下复数表示为三角形式(辐角取主值):
(1)
;
(2)
;
(3)-1
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dff871ec0eb568ba9f2a0bb97525c00c.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d19ed90fa07e523db60031ab8d53e171.png)
(3)-1
您最近一年使用:0次
2024·全国·模拟预测
解题方法
3 . (多选)一组数据
,
,
,
,
的平均值为5,方差为2,极差为7,中位数为6,记
,
,
,
,
的平均值为
,方差为
,极差为
,中位数为
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/291c25fc6a69d6d0ccfb8d839b9b4462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3282e5fde4ae53fcb1bb072a685304c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a219c950d45cf8de7191d32bde3211e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02b5d5df229b4bd36cf5a1f1c218efb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17b96e2b7111d8ca9623e40a50cc7c1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb161d863b8d35f71c685760ba5d0dc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
4 . 在
中,
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28e3fc39d2b508cc1cae769a5e7266c0.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60b97bb18e5ca34d22b5e827316a122a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/226741a02640e1710d93b2e39ec61440.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28e3fc39d2b508cc1cae769a5e7266c0.png)
您最近一年使用:0次
24-25高一上·全国·课后作业
解题方法
5 . 怎样检查你家的门框是否与地面垂直?说出理由.
您最近一年使用:0次
24-25高一上·全国·课后作业
解题方法
6 . 已知:如图,
,
,
,且
.求证:
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40b707f5ee4fbb2e637c65fbc6d8ed03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72d2a947e3fdc214d40a7d3f54679a73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5475e10ea3f37788e680395999037a00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8a4352562ae8aa968014fd0d931b677.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db444986aaa51a15bb84c12a73238b73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3728b5463f1fe868979213bf32ff2a5c.png)
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24-25高一上·全国·课后作业
7 . 在矩形ABCD中,
,点M,N分别为AB和CD的中点,在以点A,B,C,D,M,N为起点或终点的向量中,相等的非零向量共有多少对?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5181b97a7e43959b8455680157c3b644.png)
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23-24高二下·全国·课后作业
8 . 已知关于变量
有相关关系,由观测数据得到的样本数据散点图如图所示,则该组观测数据中
关于
的回归方程可能是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
名校
解题方法
9 . 已知离散型随机变量
的分布列为
若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b734e8f1546481e3eb4976008a045de.png)
![]() | 0 | 1 | 2 | 3 |
![]() | ![]() | ![]() | ![]() | ![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/006c079866a96892cf86597b47afad44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7798de276409dd7ae7e653b6bf96969.png)
A.2 | B.3 | C.6 | D.7 |
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10 . 根据3对数据
,
,
绘制的散点图知,样本点呈直线趋势,且线性回归方程为
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffe17c304a7f157998c7fcf19283964.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c53cfa785f3d78e95a3b170180fd4b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/062f492225dea1fad86164b7524bd5fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c39de6f42237e6ce9cc9aa297c08c34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
A.10 | B.9 | C.8 | D.7 |
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