解题方法
1 . “绿色出行,低碳环保”已成为新的时尚.近几年,国家相继出台了一系列的环保政策,在汽车行业提出了重点扶持新能源汽车的政策,为新能源汽车行业的发展开辟了广阔的前景.某公司对
充电桩进行生产投资,所获得的利润有如下统计数据.
(1)已知可用线性回归模型拟合y与x的关系,求其线性回归方程.
(2)判断
与
的大小,并说明理由.
参考数据:
,
.
参考公式:线性回归方程中
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![]() ![]() | 3 | 4 | 6 | 7 | 9 | 10 |
所获利润![]() | 1.5 | 2 | 3 | 4.5 | 6 | 7 |
(2)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8ad777ae637a95ca6165aa1e4f45bb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9028c2427614625d037c90c226899d40.png)
参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3ae1aa186de468239aa3d1db1e31038.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44a8bcdf79990ab8e0e705fbf3f31abe.png)
参考公式:线性回归方程中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/183200de4ff08be4eb636e8169c099a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a58291bd91befe1061530246da983727.png)
您最近一年使用:0次
2 . 若实数
满足
,则称
比
远离
.
(1)若
比
远离1,且
,求实数
的取值范围;
(2)对任意两个不相等的实数
,证明
比
远离
;
(3)若
,试问:
与
哪一个更远离
?并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d32d4403d0e81eacfbe429dc51f07f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b782dd2de9c9caa840838cd63d817de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5558c083d34cbb0a58d3ce1dc6f5778e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)对任意两个不相等的实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17b0bcc077bc78b7aae05b0c9dff42b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb3f034eb004e6db6c58a3bcd7d18cfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18f0281e6bbdbe08beeccb55adf84536.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45900deae0489e87fe448948e8091c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29ebc856291255f2d4a6c20b982a2442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
您最近一年使用:0次
2023-08-08更新
|
244次组卷
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2卷引用:江苏省盐城市阜宁县2022-2023学年高一上学期期中数学试题
3 . 已知
,
.
(1)求
的值;
(2)若
,请比较
与
的大小关系,并给出证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da5bf1fbb7d7339058beb960a4c6ae5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dc9fb3a743c6446a007aacb91a7e0e9.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/beb179e422f7d680b9edba52d9478a3b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33bd24e647a626899a243a3f3984f90a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9497f07a6499d590b4d22769f353548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e53857dcc68047c16daf7a5472feda3.png)
您最近一年使用:0次
名校
4 . 已知对于正数
、
,存在一些特殊的形式,如:
、
、
等.判断上述三者的大小关系,并证明.
![](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/d24d5c95a310a34c2bcfa644c1bb5b9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dc8b26fb79c1f4d36130c41b18c0f9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2f89a8b5cf6996a6455375e405bfb9d.png)
您最近一年使用:0次
2021-11-17更新
|
147次组卷
|
4卷引用:河南省实验中学2021-2022学年高二上学期期中数学(文)试题
河南省实验中学2021-2022学年高二上学期期中数学(文)试题河南省中原名校2021-2022学年高二上学期12月联考文科数学试题河南省顶尖名校2021-2022学年高二上学期第二次素养调研文科数学试题(已下线)高一上学期第一次月考十四大题型归纳(基础篇)-举一反三系列