名校
解题方法
1 . 已知复数
,
,
,它们所对应的点分别为
、
、
,在复平面上构成一个正方形的三个顶点.
(1)画出示意图,验证说明
;
(2)求这个正方形的第四个顶点对应的复数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db04f988e1aba18b0a3470d332908c15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70ae34624f8f116b37c06560710e63fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ea8640c311d5f7d3c94cf817b332ad8.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)
(1)画出示意图,验证说明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
(2)求这个正方形的第四个顶点对应的复数.
您最近一年使用:0次
23-24高一下·全国·随堂练习
2 . 在复平面内,作出表示下列各复数的点和所对应的向量,求出其共轭复数以及模:
(1)
;
(2)
;
(3)
;
(4)
;
(5)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93e591f4fb0e4345503aa3fca07fdf50.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6712e57e9176d4757aa86cc6825169c2.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75b833bd0629ea933e98220d5f73a41f.png)
(5)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5053541d26bbaf1d80c50fab16d7aee5.png)
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2024高一下·全国·专题练习
3 . 如图,向量
对应的复数是
,分别作出下列运算的结果对应的向量:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e18c6df52ffa68d6b8baa8b74b35f31d.png)
(2)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bc9207fbba253884cf2ff7e93c9ed57.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e062a2bd1d8ac11d2fe26806a4fa2031.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e18c6df52ffa68d6b8baa8b74b35f31d.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bc9207fbba253884cf2ff7e93c9ed57.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e64320e73e2128a574c0a1b867ddd2b5.png)
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解题方法
4 . 甲、乙两所学校高三年级分别有1200人,1000人,为了了解这两所学校全体高三年级学生在该地区六校联考的数学成绩情况,采用分层抽样方法从两所学校一共抽取了110名学生的数学成绩(都在
内),并作出了频数分布统计表如下:
(1)计算
的值并估计乙校抽取的学生数学成绩的平均数;
(2)若规定考试成绩在
内为优秀,根据以上统计数据完成
列联表,并依据小概率值
的独立性检验,判断这两所学校的数学成绩是否有差异?
附:
,其中
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aed136416769952c4a2efcf97ae6526c.png)
甲校 | 分组 | ![]() | ![]() | ![]() | ![]() | ||||||
频数 | 3 | 4 | 8 | 15 | |||||||
分组 | ![]() | ![]() | ![]() | ![]() | |||||||
频数 | 15 | ![]() | 3 | 2 | |||||||
乙校 | 分组 | ![]() | ![]() | ![]() | ![]() | ||||||
频数 | 1 | 2 | 8 | 9 | |||||||
分组 | ![]() | ![]() | ![]() | ![]() | |||||||
频数 | 10 | 10 | ![]() | 3 | |||||||
甲校 | 乙校 | 总计 | |||||||||
优秀 | |||||||||||
非优秀 | |||||||||||
总计 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
(2)若规定考试成绩在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2824ba82c2227475c27a9fea5e30245a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b72fcdc709e77910cd36a26369648b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29f81f285940b14b97f368469121efab.png)
附:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f503f0dec4cf2cc95ad9521c5eaf9f18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356b05e46b10ee51c3e43546d73ec96c.png)
![]() | 0.10 | 0.05 | 0.010 | 0.005 |
![]() | 2.706 | 3.841 | 6.635 | 7.879 |
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解题方法
5 . 某车间为了规定工时定额,需要确定加工零件所花费的时间,为此作了四次试验,得到的数据如表:
,
(1)在给定的坐标系中画出表中数据的散点图;
(2)求出
关于
的线性回归方程
;
(3)预测加工10个零件需要多少小时?
零件的个数x(个) | 2 | 3 | 4 | 5 |
加工的时间y(小时) | 2.5 | 3 | 4 | 4.5 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d655618f2140f83563793b747d58d1e.png)
(1)在给定的坐标系中画出表中数据的散点图;
(2)求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1db6103cb0f1d2bd6b19235d53ee7e98.png)
(3)预测加工10个零件需要多少小时?
您最近一年使用:0次
2023-12-11更新
|
350次组卷
|
3卷引用:专题05选择性必修三+选择性必修四期末考点汇总(12题型)-1
(已下线)专题05选择性必修三+选择性必修四期末考点汇总(12题型)-1新疆哈密市第八中学2021-2022学年高二上学期期末考试数学(文)试题新疆哈密市第八中学2021-2022学年高二上学期期末数学(理)试题
6 . 在复平面内作出表示下列复数的点:
(1)
;
(2)
;
(3)
;
(4)5.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b40e803a6dc17c94688c925db9ad8c4.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12002cdd2c5d19efce5f8347344d3abc.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0591964e11722ed36a096694935a6837.png)
(4)5.
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2023-10-09更新
|
166次组卷
|
8卷引用:第01讲 复数的概念-《知识解读·题型专练》(人教A版2019必修第二册)
(已下线)第01讲 复数的概念-《知识解读·题型专练》(人教A版2019必修第二册)(已下线)第02讲 7.1.2 复数的几何意义(1)-【帮课堂】(人教A版2019必修第二册)(已下线)专题10 复数的概念-《重难点题型·高分突破》(人教A版2019必修第二册)(已下线)7.1.2 复数的几何意义(分层练习)-【上好课】(已下线)专题12 复数的概念及几何意义-《重难点题型·高分突破》(苏教版2019必修第二册)(已下线)习题 5-1北师大版(2019)必修第二册课本习题 习题5-17.1. 2复数的几何意义练习
7 . 在复平面内,作出表示下列各复数的点和所对应的向量:
(1)
;
(2)
;
(3)
;
(4)
;
(5)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93e591f4fb0e4345503aa3fca07fdf50.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6712e57e9176d4757aa86cc6825169c2.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75b833bd0629ea933e98220d5f73a41f.png)
(5)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5053541d26bbaf1d80c50fab16d7aee5.png)
您最近一年使用:0次
2023-10-09更新
|
118次组卷
|
5卷引用:第01讲 复数的概念-《知识解读·题型专练》(人教A版2019必修第二册)
(已下线)第01讲 复数的概念-《知识解读·题型专练》(人教A版2019必修第二册)(已下线)1.2 复数的几何意义(已下线)5.1.2复数的几何意义-【帮课堂】(北师大版2019必修第二册)北师大版(2019)必修第二册课本例题1.2 复数的几何意义北师大版(2019)必修第二册课本习题第五章1.2 复数的几何意义
解题方法
8 . (1)在复平面上画出与以下复数
,
,
,
分别对应的点
,
,
,
.
,
,
,
.
(2)求向量
,
,
,
的模.
(3)点
,
,
,
中是否存在两个点关于实轴对称?若存在,则它们所对应的复数有什么关系?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af68f652b4c13657ffddf3c9e7eb262b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa224ed9be8766a4d0b5138bd57de0f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a67a742d2a43e907fb1c3a1bdf1d6a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b29a77cfdb8d2a0b684389921e1496c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/797e67927616b141ed7c6b83f8b6f4fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fee50575e3ebd56c4f46dd0bbf8e55d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a976c188b072c749662aedf482193dce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f11988aa7569790689bea75a91925eeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca0c37c074c1b18db19e9a315abe7815.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64a1508dfc7acb431d0ffc31e549e353.png)
(2)求向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96cb7ee166966ed0b1605c263e433cf8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcc77d6da6e8f3ad5c239e7cc6c9930c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aed22ce98b22693a90269d933bb6c02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3a7cb1e5ee3fe9de342bb85371db7e5.png)
(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/797e67927616b141ed7c6b83f8b6f4fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fee50575e3ebd56c4f46dd0bbf8e55d3.png)
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23-24高二上·上海·课后作业
解题方法
9 . 为了解大学校园附近餐馆的月营业收入(单位:千元)和该店周围的大学生人数(单位:千人)之间的关系,抽取了10所大学附近餐馆的有关数据,如下表所示.
学生人数x/千人 | 2 | 6 | 8 | 8 | 12 | 16 | 20 | 20 | 22 | 26 |
月营业收入y/千元 | 58 | 105 | 88 | 118 | 117 | 137 | 157 | 169 | 149 | 202 |
(1)根据以上数据,建立月营业收入y与该店周围的大学生人数x的回归方程;
(2)已知某餐馆周围的大学生人数为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1926eb08a21a8b6558fcfd4c52a4a23b.png)
参考公式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ae53ad6401924bc60922fd61bee131.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1db6103cb0f1d2bd6b19235d53ee7e98.png)
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解题方法
10 . 为了研究某种细菌随天数
变化的繁殖个数
,收集数据如下:
(1)在图中作出繁殖个数
关于天数
变化的散点图,并由散点图判断
(
为常数)与
(
为常数,且
)哪一个适宜作为繁殖个数
关于天数
变化的回归方程类型?(给出判断即可,不必说明理由)
(2)对于非线性回归方程
(
为常数,且
),令
,可以得到繁殖个数的对数z关于天数x具有线性关系及一些统计量的值.
(ⅰ)证明:“对于非线性 回归方程
,令
,可以得到繁殖个数的对数
关于天数
具有线性 关系(即
为常数)”;
(ⅱ)根据(ⅰ)的判断结果及表中数据,建立
关于
的回归方程(系数保留2位小数).
附:对于一组数据
,其回归直线方程
的斜率和截距的最小二乘估计分别为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
天数![]() | 1 | 2 | 3 | 4 | 5 | 6 |
繁殖个数![]() | 6 | 12 | 25 | 49 | 95 | 190 |
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/7/4bacce99-5592-4ee8-bcc4-a60b71687351.png?resizew=149)
(1)在图中作出繁殖个数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce3a7d89965c094792f87594bd68afd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bda9896c593ee0a75ac2db7ddd6ee7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31091823724baad3b893de6214ed243d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0de04adc20200028d604f7bf08582aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb2de2538d41d5fbc30744fc8c0e4fe3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)对于非线性回归方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31091823724baad3b893de6214ed243d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0de04adc20200028d604f7bf08582aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb2de2538d41d5fbc30744fc8c0e4fe3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54d28162b2a8309f0f7f193e733be414.png)
![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
3.50 | 62.83 | 3.53 | 17.50 | 596.57 | 12.09 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31091823724baad3b893de6214ed243d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54d28162b2a8309f0f7f193e733be414.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b73c7432ba7e04d20bda1363ffa48bc.png)
(ⅱ)根据(ⅰ)的判断结果及表中数据,建立
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
附:对于一组数据
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69f22ea836f2025901725da985790579.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f95523e41adf5e135049d4097a07f189.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c5a0bfe22905260f047609a4180c21e.png)
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