名校
1 . 中国古代建筑中的圆柱,多是根部略粗,顶部略细,这种做法称为“收分”,柱子做出收分,既稳定又轻巧.已知某古代建筑的一根圆柱,每增高
,直径收分
,若该柱子柱根直径为
,柱高
,则柱头直径为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01f8039a874d818f0067ad4dc93bdd33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/048b61a5fb5f420c6d7de88db5bc3aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3668a3f3ce5b8a272ad92c2ebd233f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e17ee14bd91bfff409c06fd434f6745.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024-05-29更新
|
187次组卷
|
4卷引用:江西省抚州市金溪县第一中学等校2023-2024学年高二下学期期中考试数学试卷
江西省抚州市金溪县第一中学等校2023-2024学年高二下学期期中考试数学试卷 江西省南昌市安义中学2023-2024学年高二下学期4月期中调研测试数学试题(已下线)6.1基本立体图形-【帮课堂】(北师大版2019必修第二册)(已下线)6.1 基本立体图形 同步精品课堂(北师大版2019必修第二册)
名校
解题方法
2 . 已知点
,
,
,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cb9e88d3e58141dba299dcd8edc4e18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b02af485e17e7628fd5a3ace6e0a32ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84a56e5ddc6dc057aa4076130cc6ce19.png)
A.![]() |
B.若点![]() ![]() |
C.若![]() ![]() |
D.若![]() ![]() |
您最近一年使用:0次
2024-05-23更新
|
514次组卷
|
6卷引用:江西省部分学校2023-2024学年高一下学期4月期中考试数学试题
名校
解题方法
3 . 近年来中国人工智能产业爆发式的增长,推动了AI电商行业的快速发展,已知2020-2023年中国AI解决方案提供商企业数量分别为1617,2106,2329,2896,从这4个数字中任取2个数字,当所取两个数字差的绝对值小于500时,随机变量
;当所取两个数字差的绝对值不小于500时,随机变量
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f53840590737b3cad20fa4126bf1c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71ce9db5574a2df6184bdc7cd13b208a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5b9249c10ae3896e2ee96bfa1a153e5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024-05-19更新
|
276次组卷
|
2卷引用:江西省抚州市金溪县第一中学等校2023-2024学年高二下学期期中考试数学试卷
4 . 函数
在
上的平均变化率等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/504533db232530466f5fe04837191592.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6c1756b564bf1d998d8179637011c88.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024-05-15更新
|
281次组卷
|
2卷引用:江西省抚州市金溪县第一中学等校2023-2024学年高二下学期期中考试数学试卷
名校
5 . 已知
中,点
满足
,点
在
内(含边界),其中
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b487df3bd4826ed3e266f4f8677fee5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c025ee3317be1099b7bf03a11e37ed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5331e29182b4a87e2d68127932ced86.png)
A.若![]() ![]() ![]() | B.若![]() ![]() |
C.若存在![]() ![]() | D.存在![]() ![]() |
您最近一年使用:0次
2024-05-07更新
|
155次组卷
|
4卷引用:江西省抚州市金溪县第一中学等校2023-2024学年高一下学期期中考试数学试卷
名校
解题方法
6 . 已知某曲线方程为
,其中a,
,a与b可以相等,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/351d429d1e666f9bf4b1e4b653b3ef4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f9bc37fb76a52e7b9aee79242e1423b.png)
A.该曲线为圆的概率为![]() | B.该曲线为椭圆的概率为![]() |
C.该曲线为双曲线的概率为![]() | D.该曲线为抛物线的概率为![]() |
您最近一年使用:0次
名校
7 . 平面几何中有定理:若点
为锐角
的外心,直线
,
,
分别与锐角
外接圆交于另外一点
,
,
,则
.若锐角
的外接圆方程为
,且该圆与
轴的交点分别为
,
,则六边形
的面积的最大值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfdceec9c7010b2ad114e0d72f33d97f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29c1a6aada35b8c3676d3bb72b9cec42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/b423e24a65f50b9ca1caa09c3fafdb51.png)
您最近一年使用:0次
2024-05-06更新
|
75次组卷
|
2卷引用:江西省抚州市金溪县第一中学等校2023-2024学年高二下学期期中考试数学试卷
名校
解题方法
8 . 近年来,宠物逐渐成为人们的精神寄托,在供需端及资本的共同推动下中国宠物经济产业迅速增长,数据显示,目前中国养宠户数在全国户数中占比为
.
(1)把频率作为概率,从中国家庭中随机取4户,求这4户中至少有3户养宠物的概率;
(2)随机抽取200名成年人,得到如下列联表:
是否有
的把握认为是否养宠物与性别有关?
(3)记2018-2023年的年份代码
依次为1,2,3,4,5,6,中国宠物经济产业年规模为
(单位:亿元),由这6年中国宠物经济产业年规模数据求得
关于
的回归方程为
,且
.求相关系数
,并判断该回归方程是否有价值.
参考公式:
,其中
,
时有99%的把握认为变量有关联.
回归方程
,其中
,
,相关系数
,若
,则认为
与
有较强的相关性.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3ffd5c35bba71ea54c28622b6cf505d.png)
(1)把频率作为概率,从中国家庭中随机取4户,求这4户中至少有3户养宠物的概率;
(2)随机抽取200名成年人,得到如下列联表:
成年男性 | 成年女性 | 合计 | |
养宠物 | 38 | 60 | 98 |
不养宠物 | 62 | 40 | 102 |
合计 | 100 | 100 | 200 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a363cc53497fdfac77b43f656424f973.png)
(3)记2018-2023年的年份代码
![](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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ef1a1123f3cbf1c4d9896ba82051f89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2962cd7823d2ef0e6e0263b667a5d29f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
参考公式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2187714e660234f0b72f2b47d3ea685a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356b05e46b10ee51c3e43546d73ec96c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb8236aa47286c8cbc95fcb564a4a3a4.png)
回归方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a10cb9fd6d5c388cd9d28556d9e9dd8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2dbdbf02e0dd324daba7488c3e3bf31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31815979a4ab71755f89089d4e988a3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ae9421919944d997c304d7711b4b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2991502b0be7df4183b9e42b6c53c6e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
您最近一年使用:0次
2024-05-06更新
|
188次组卷
|
2卷引用:江西省抚州市金溪县第一中学等校2023-2024学年高二下学期期中考试数学试卷
9 . 如图是一个弓形(由弦
与劣弧
围成)展台的截面图,
是弧
上一点,测得
,
,
,则该展台的截面面积是______
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed41d321f4c0717ac5b443aad942d9a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed41d321f4c0717ac5b443aad942d9a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c56fc43a10c8583224aabffc2ca351dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e81e7aa0d4a8fb4cbf6a17dabcc326e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b27e47690ed332c573186992b6d25654.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35c901bcdfa58f0c68ad0161b0bab269.png)
您最近一年使用:0次
名校
解题方法
10 . 已知
,
,
,
,则在
,
,
,
,
,
这6个数中最小的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785dac87206d5a2fde58dc629575440.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cebc1007b5d36761f8049826077df50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0595ddf421f5eb6304903870905adf06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f44db1ac4ff914ce499c4f650ca9e517.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1103ddae6ffaba2b15808c6df09c0248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77fa8d7b2895886fb1a63a127acbe69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94720967984b2ab27d9637569ee1c146.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1afc5679cf6db93d692a4e38ea07c41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dc952bb461a420a6877211ce32ac50d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb00b6918dfb251c1a63acdc07464b92.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024-05-02更新
|
630次组卷
|
2卷引用:江西省宜春市丰城中学2023-2024学年高一下学期4月期中考试数学试题