名校
解题方法
1 . 已知复数
,
,(
,
,
),且
.
(1)若
且
,求
的值;
(2)设
,关于
的方程
在
上恰有
解,求实数
的值以及方程的解集.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68500d55d76a20d72701afd11c49c258.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b76aba5e1e8b5e594feeaae181b1664.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb63478132d4c1fef3c17e591919da83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9de59a6da1ee210ccf04651ae53275dd.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/558e11d700481dc414d5d073b4b88a3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c87874458fabe50aff5e19d586d5d94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ac06500ca54cb8981de2a69dcd8fccc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1639d47583555e889c30159bc85adcb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71163f419555f2ed76075c8ff659fbfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
2 . 某超市为了解气温对某产品销售量的影响,随机记录了该超市12月份中
天的日销售量
(单位:千克)与该地当日最低气温
(单位:
)的数据,如下表所示:
求
关于
的线性回归方程
;(精确到
)
判断
与
之间是正相关还是负相关;若该地12月份某天的最低气温为
,请用
中的回归方程预测该超市当日的销售量.
参考公式:
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ebff20f21ae41fd8d1f1e3145895842.png)
参考数据:
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](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/d1e8c29227443fdce7a5f66727f9ae77.png)
![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf6c84731e5e1bd335ecfc2d36c3d81.png)
![](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/929ef3bed0a4bdd22f39e036506dc481.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/042e234d538bc2c789d7c5a314f1ca92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f53190d6ead827a6338b9de847aeaf1.png)
![](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/6d269d5f663fd6dea64baf9487400412.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf6c84731e5e1bd335ecfc2d36c3d81.png)
参考公式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b34073ec2c46a4899f2dc7cf0a8075.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ebff20f21ae41fd8d1f1e3145895842.png)
参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b9d405bbed3992f19bbb099e58f80ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd661da617daebed3b8641acb90aef2d.png)
您最近一年使用:0次
2019-09-19更新
|
639次组卷
|
3卷引用:8.1.1 变量的相关关系(分层作业)-【上好课】高二数学同步备课系列(人教A版2019选择性必修第三册)
(已下线)8.1.1 变量的相关关系(分层作业)-【上好课】高二数学同步备课系列(人教A版2019选择性必修第三册)广东省潮州市2018-2019学年高二下学期期末教学质量检测数学(文)试题广东省潮州市2018-2019学年高二下学期期末教学质量检测数学(理)试题