名校
1 . 如图,边长为1正方形
,射线
从
出发,绕着点
顺时针方向旋转至
,在旋转的过程中,记
,
所经过的在正方形
内的区域(阴影部分)的面积为
,则函数
的图像是
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/111441d2-672b-47d2-9f44-72cb82c041cb.png?resizew=135)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8213df1d2811e0ec5c6d7230fabe1c28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/111441d2-672b-47d2-9f44-72cb82c041cb.png?resizew=135)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2019-01-11更新
|
816次组卷
|
5卷引用:【市级联考】湖南省株洲市2019届高三教学质量统一检测(一)理科数学试题
名校
2 . 截止到
年末,我国公路总里程达到
万公里,其中高速公路达到
万公里,规模居世界第一.与此同时,行车安全问题也成为管理部门关注的重点.如图是某部门公布的一年内道路交通事故成因分析,由图可知,超速驾驶已经成为交通事故的一个主要因素.研究表明,急刹车时的停车距离等于反应距离与制动距离的和,下表是根据某部门的调查结果整理所得的数据(
表示行车速度,单位:
;
,
分别表示反应距离和制动距离,单位:
)
![](https://img.xkw.com/dksih/QBM/2020/1/12/2375314927026176/2375456431472640/STEM/3d095cba99b34409ac14d7a6c7833d61.png?resizew=213)
道路交通事故成因分析
(1)从一年内发生的道路交通事故中随机抽出
起进行分析研究,求其中恰好有
起属于超速驾驶的概率(用频率代替概率);
(2)已知
与
的平方成正比,且当行车速度为
时,制动距离为
.
(i)由表中数据可知,
与
之间具有线性相关关系,请建立
与
之间的回归方程,并估计车速为
时的停车距离;
(ii)我国《道路交通安全法》规定:车速超过
时,应该与同车道前车保持
以上的距离,请解释一下上述规定的合理性.
参考数据:
,
,
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbb22dfe8ae8877a6a8e3fbbff156550.png)
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估计分别为:
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6567511bb9486b2ca7452b870abd2a1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f7f1c4fb6528a06cb9b131cbfa355a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0bbacf550f8fab371894079dfa45a8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc13a607ac0c7f76d252d7cb1bb040fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe20ba65a5a470ca5886b99ff4bcc8e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5edf900c810371fb21297c15f86d8743.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b31ac1def558351e2e3ed1235c570530.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://img.xkw.com/dksih/QBM/2020/1/12/2375314927026176/2375456431472640/STEM/3d095cba99b34409ac14d7a6c7833d61.png?resizew=213)
道路交通事故成因分析
![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b31ac1def558351e2e3ed1235c570530.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc13a607ac0c7f76d252d7cb1bb040fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/544291d87c360667480d7db95f94096b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b6f5a6c794ae5b446273e64eca26405.png)
(i)由表中数据可知,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5edf900c810371fb21297c15f86d8743.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc13a607ac0c7f76d252d7cb1bb040fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5edf900c810371fb21297c15f86d8743.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc13a607ac0c7f76d252d7cb1bb040fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fa96b50d032fff02d58d9062d486044.png)
(ii)我国《道路交通安全法》规定:车速超过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/544291d87c360667480d7db95f94096b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed3eb9b39420dfcf48e341125d8b629a.png)
参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/659cd2152529299acc77bd06c3aa5b29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff7a8ec8a3b9b8d696564f8ad94a5a13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92cd9e18e35efca2891ccf11c2fb2401.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80ea844baa6299fc8ecc977d05cc4dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbb22dfe8ae8877a6a8e3fbbff156550.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/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92abae836b8026511113ad8c3ea23028.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1db6103cb0f1d2bd6b19235d53ee7e98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2dbdbf02e0dd324daba7488c3e3bf31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a58291bd91befe1061530246da983727.png)
您最近一年使用:0次
2020-01-12更新
|
182次组卷
|
5卷引用:湖南师范大学第二附属中学培训部2021届高三下学期入学考试数学试题
湖南师范大学第二附属中学培训部2021届高三下学期入学考试数学试题江苏省连云港市2020-2021学年高三上学期1月适应性演练模拟考试数学试题(已下线)黄金卷02 【赢在高考·黄金20卷】备战2021年高考数学全真模拟卷(广东专用)2020届山东实验中学高三2月新高考模式网上考试试验部数学试题山东省济南市2019-2020学年高三上学期期末数学试题
3 . 如图,网格纸上正方形的边长为1,图中粗实线画出的是一个几何体的三视图,则这个几何体的表面积是
![](https://img.xkw.com/dksih/QBM/2017/4/5/1659035943198720/1659377118158848/STEM/3f3fbccc5af74267aa27af9c88090a6d.png?resizew=188)
![](https://img.xkw.com/dksih/QBM/2017/4/5/1659035943198720/1659377118158848/STEM/3f3fbccc5af74267aa27af9c88090a6d.png?resizew=188)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2017-04-05更新
|
35次组卷
|
2卷引用:2017届湖南省湘潭市一中、长沙一中、师大附中、岳阳市一中、株洲市二中、常德市一中高三下学期六校联考数学(文)试卷