名校
解题方法
1 . 某地区响应“节能减排,低碳生活”的号召,开展系列的措施控制碳排放.环保部门收集到近5年内新增碳排放数量,如下表所示,其中x为年份代号,y(单位:万吨)代表新增碳排放量.
(1)请计算并用相关系数
的数值说明
与
间具有较强的线性相关性(若
,则线性相关程度较高);
(2)求
关于
的线性回归方程,并据此估计该地区
年的新增碳排放.
参考数据:
,
,
,
,
,
,
.
参考公式:对于一组数据
,
,…,
,其回归直线的斜率和截距的最小二乘法估计公式,相关系数r的公式分别为
,
,
.
年份 | 2019 | 2020 | 2021 | 2022 | 2023 |
年份代号 | 1 | 2 | 3 | 4 | 5 |
新增碳排放 | 6.1 | 5.2 | 4.9 | 4 | 3.8 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.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/4fb540658171f0b12b6481f6a100eb84.png)
(2)求
![](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/a8e8936c9fe1e81726455908657a29fc.png)
参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b2c6aedcf24d25c60d9003776b233eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7397095080de1d554a35cf76ea274ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe1ef253b10ba4fec38bf7a7eca284e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b27421a2920471744c773c7db804859.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9917a5fc700544ca09d5f37d981d161.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e54eef02d751ca240ad33d6d9de8314.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d6705e119c75700d99fdd3a748a2c5d.png)
参考公式:对于一组数据
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56720e2f2b0ddd72156da495923698da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2852ae85cfcc804b3192ea8543c88938.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92abae836b8026511113ad8c3ea23028.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd4c0c64df8779dce27b2e59b6ba13f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a58291bd91befe1061530246da983727.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05a9c3fb6dd0f87259288a9deadc4319.png)
您最近一年使用:0次
2024-03-03更新
|
700次组卷
|
8卷引用:陕西省韩城市2023-2024学年高二上学期期末统考数学试题
陕西省韩城市2023-2024学年高二上学期期末统考数学试题(已下线)第八章 成对数据的统计分析(知识归纳+题型突破)-2023-2024学年高二数学单元速记·巧练(沪教版2020选择性必修第二册)(已下线)8.2 一元线性回归模型及其应用(分层练习,7大题型)-2023-2024学年高二数学同步精品课堂(人教A版2019选择性必修第三册)(已下线)9.1 线性回归分析(2)辽宁省沈阳市辽宁实验中学北校2023-2024学年高二下学期4月阶段测试数学试题(已下线)专题8.6 成对数据的统计分析全章八大压轴题型归纳(拔尖篇)-2023-2024学年高二数学举一反三系列(人教A版2019选择性必修第三册)(已下线)人教B高二期末测试卷(已下线)专题04 成对数据的统计分析-1
名校
2 . 在四棱锥
中,
平面
,
,
,
,
,
为
的中点,则二面角
的余弦值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/29/64d4a683-d599-4563-bb90-73a705f59f12.png?resizew=159)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72c4340dcffb0783d118a587e5352a2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/829e5470a4cead63cc27f6dd524441ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c1ac2e11788860424508ea9e80cf89d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70682f6196e6c1a08eb48da73e8919ca.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/29/64d4a683-d599-4563-bb90-73a705f59f12.png?resizew=159)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
3 . (1)求经过两条直线
和
的交点,并且垂直于直线
的直线方程;
(2)已知圆
的圆心在直线
上,圆
与直线
相切,且在直线
上截得的弦长为
,求圆
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/227d4946b9dbfdc8bef33b42b6a82572.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b6c22d1d53d8f0ed30d5c8a9cf30b4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d717a25a45873801c0e6c1cba9468cd.png)
(2)已知圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f1a686b80b8f109a929f58c2de7201d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42498f6e0fc9a61c9857b70a87f02c5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5428b040be21dcd503d350478c0a4773.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35361e76a7c85d1886728c8d0200b234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
您最近一年使用:0次
名校
解题方法
4 . 如图,过点
的椭圆
的离心率为
,椭圆与
轴交于点
,过点
的直线
与椭圆交于另一点
,并与
轴交于点
,直线
与直线
交于点
;
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/28/c1612ca3-6697-44a0-ba68-fb3bf8bb6cc2.png?resizew=174)
(1)当直线
过椭圆右焦点时,求
点的坐标;
(2)当点
异于点
时,求证:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52f6dd0159f0fe46dbc3f4e493f8d3e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf1ee6720a96e47c7e509941d53dc7a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/28/c1612ca3-6697-44a0-ba68-fb3bf8bb6cc2.png?resizew=174)
(1)当直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a5215b714cde3ed7790b3ed4f6711c3.png)
您最近一年使用:0次
名校
解题方法
5 . 已知正方体
的棱长为1,H为棱
上的动点,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
A.![]() |
B.平面![]() ![]() ![]() |
C.三棱锥![]() |
D.若![]() ![]() ![]() ![]() ![]() |
您最近一年使用:0次
名校
解题方法
6 . 已知标准方程的双曲线的一条渐近线方程为
,且过点
,则双曲线的方程为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f52cb58b6bc5d71030463ba7e28134.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/238f0ea276a00ae8d681ce00cc11c8ea.png)
您最近一年使用:0次
名校
解题方法
7 . (1)若
的展开式中共有7项,求常数项;
(2)已知
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae96ada99d80dd523b8f0e8c73af6087.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ec469734839734bb5b1de09d0b4a7ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66e199c21525cb52083e043116a9203.png)
您最近一年使用:0次
名校
解题方法
8 . 直线
的方向向量为
,且
过点
,则点
到
的距离为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb48e69bb5f2a423e59115b8b34378e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f6dcd362a44588747e88b206e7c5ca4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e64fd5823f70ff23c7be7f4b8a1eb8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
您最近一年使用:0次
名校
解题方法
9 . 已知抛物线
的焦点
在
轴的正半轴上,点
在物物线内,若抛物线
上一动点
到
两点距离之和的最小值为4.
(1)求抛物线
的焦点坐标和准线方程;
(2)直线
过抛物线
的焦点
且倾斜角为
,并与抛物线
相交于
两点,求弦
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab748cf5e6a17272677d0e9ae4d9588b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d8348c89c6f13053325f4e1c62e29a.png)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
您最近一年使用:0次
名校
解题方法
10 . 一名老师和两名男生两名女生站成一排照相,要求两名女生必须站在一起且老师不站在两端,则不同站法的种数为______ .
您最近一年使用:0次