解题方法
1 . 已知函数
,
.
(1)若函数
与
的图象有相同的对称轴,则实数
( )
(2)若关于x的不等式
恒成立,则实数a的取值范围是( )
(3)设关于x的不等式
的解集为M,
的解集为N,若
,则实数a的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/933ddc2a52f5f236eb1769328920b0da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/066f70c8082929eec005cca7c2d4ec4e.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
A.-1 | B.1 | C.-2 | D.2 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a71baf6217604517fd98fa97d0f55b43.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e9c599e8d420006448905acec2b8234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1a2c01ac2a7f6ad7e03cb7a61daefab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2333f966f6ec29f0661f93d99b055cd5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
2 . 为了更好地锻炼身体,某人记录了自己4月份(共30天)每天行走的步数,将每天行走的步数(单位:千步)进行如下分组:
,
,
,
,
,
,并作出如图所示的频率分布直方图.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/7/5532229f-b0dd-44c0-b85e-3487c22a9c06.png?resizew=293)
(1)由频率分布直方图估计此人每天行走步数(单位:千步)的众数是( )
(2)若按此锻炼习惯,估计此人未来30天中行走不少于2万步的天数是( )
(3)若同一组数据以这组区间的中点值作代表,估计此人该月平均每天行走的步数(单位:千步)是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/803867ed9e8c5e81c9ce8a309c83ebb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e337b36ad6fe037f2170065732df34e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fcd09aee502a834ca69486861ea9c5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41fc432330eed6e6c51d7abc5e38dcc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27582493e2169299738c4ebc1c8d171c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac9ab835e5d5d0bb7bdde1cb9d81a5a2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/7/5532229f-b0dd-44c0-b85e-3487c22a9c06.png?resizew=293)
(1)由频率分布直方图估计此人每天行走步数(单位:千步)的众数是( )
A.10 | B.12.5 | C.15 | D.17.5 |
A.3 | B.5 | C.6 | D.10 |
A.13.5 | B.14.5 | C.15.5 | D.16.5 |
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3 . 一批瓶装纯净水,每瓶标注的净含量是
,现从中随机抽取10瓶,测得各瓶的净含量为(单位:
):
若用频率分布估计总体分布,则该批纯净水每瓶净含量在
之间的概率估计为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e480fe54939fd364304743f31133f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df7110dbe1171707a78b3b5c9fcb2498.png)
542 | 548 | 549 | 551 | 549 | 550 | 551 | 555 | 550 | 557 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05dbcd6825ab5a7a1edbfec1646a02e7.png)
A.0.3 | B.0.5 | C.0.6 | D.0.7 |
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2023-03-07更新
|
693次组卷
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12卷引用:2021年5月河北省普通高中学业水平合格性考试数学试题
2021年5月河北省普通高中学业水平合格性考试数学试题(已下线)频率与概率(已下线)10.2-10.3 事件的相互独立性、频率与概率(分层练习)(已下线)10.3.1 频率的稳定性 (分层作业)(已下线)专题10.8 概率全章综合测试卷(基础篇)-2022-2023学年高一数学举一反三系列(人教A版2019必修第二册)(已下线)10.3频率与概率(课件+练习)-【超级课堂】(已下线)10.3 频率与概率(精练)-【题型分类归纳】(已下线)第05讲 统计与概率14种常见考法归类(3)(已下线)3频率与概率-同步精品课堂(北师大版2019必修第一册)(已下线)10.3.1&10.3.2?频率的稳定性、随机模拟——课后作业(提升版)(已下线)专题24 事件的相互独立性 频率与概率-《重难点题型·高分突破》(人教A版2019必修第二册)(已下线)专题24 随机事件和样本空间 随机事件的概率-《重难点题型·高分突破》(苏教版2019必修第二册)
4 . 某鞋店销售a,b,c,d四种不同款式的运动鞋,甲、乙、丙三人每人任意选择一款运动鞋购买,则不同的购买选择有( )
A.24种 | B.48种 | C.64种 | D.81种 |
您最近一年使用:0次
2023-02-05更新
|
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5卷引用:河北省衡水第一中学等50所学校2020-2021学年高二下学期5月联考数学试题
河北省衡水第一中学等50所学校2020-2021学年高二下学期5月联考数学试题(已下线)第六章 计数原理 讲核心 01天津市静海区四校2022-2023学年高二下学期3月阶段性检测数学试题(已下线)3.1.1基本计数原理题组课堂练习-2022-2023学年高二下学期数学人教B版(2019)选择性必修第二册天津市滨海新区北京师范大学天津生态城附属学校2023-2024学年高二下学期第一次月考数学试卷
5 . 如图1,△ABC中,
,
,
,
中,
,
,
,现沿AB,BC,CA将
,
,
折起,使点
,
,
重合于点P(如图2),此时二面角P-AC-B的余弦值为
,则四面体P-ABC外接球的表面积为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/15/37eb1830-f074-499f-8381-5616f4d6cfac.png?resizew=229)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a71de9ba8cb08067eaf7cda09db94e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ac48a013a9d27e0ef71cfc9205f35d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81e95ea8d5c6710c2742fd8b7aa5b541.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51bedd1335844bae589b804c3627d000.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e2a87ce8a30df2e075c4ecd49fe0c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51d61a82c525a5546262998c6f8e1799.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/496e5ca3b3ea17fe6dc1299105c2ec86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ac48a013a9d27e0ef71cfc9205f35d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81e95ea8d5c6710c2742fd8b7aa5b541.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51bedd1335844bae589b804c3627d000.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/797e67927616b141ed7c6b83f8b6f4fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/15/37eb1830-f074-499f-8381-5616f4d6cfac.png?resizew=229)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
解题方法
6 . 若
表示不超过
的最大整数,
,数列
的前
项和为
,数列
满足
且
,数列
满足
,
,
,数列
前
项和为
,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4f5908d6a1217e493ed7586b6964dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bda385cfb07517a301d603a73283b87d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3ad028f208e5c29da62c8addcc3c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b1fab31e798c6d8670fdb3b3d7ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1df7f2beffd703583d4b4db720bf778b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ea11bd18577ee314988bc70b0caf23f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b47f7628a4bc820fd0ada5b444f88522.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13e7dbf7f4fc25d3a971cb14b8c22170.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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7 . 为提高新农村的教育水平,某地选派4名优秀的教师到甲、乙、丙三地进行为期一年的支教活动,每人只能去一个地方,每地至少派一人,则不同的选派方案共有( )
A.18种 | B.12种 | C.72种 | D.36种 |
您最近一年使用:0次
2022-03-20更新
|
2110次组卷
|
10卷引用:河北省石家庄市藁城新冀明中学2022届高三上学期12月月考数学试题
名校
8 . 二次函数
为常数,
中的
与
的部分对应值如下表所示:
当
时,下列结论一定正确的是( )
①
;②
;③若点
在二次函数
的图象上,则
;④当
时,
的两根分别为
,则
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0166102d801cc1bb81c15f4e212e91ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7d209d8dfe7b17cb715c42f63c66464.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/3838d126e7480e3e0827999f3cf9f771.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ce655a13dea9309f8ed84036ba293aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf495ed4d2adfd104ad5d90353b9a45b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b70fc850e0eec4580731c4d8c74849a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4561e662151983a27b3e8c8fcc857f06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192b0cfd9374cb4a649d1b5376f5e718.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d56d8ea1048ed42b56369d35041ecae.png)
A.①②③ | B.②③④ | C.②③ | D.③④ |
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9 . 如图,AB∥CD,BF平分∠ABE,且BF⊥DE,垂足为F,则∠ABE与∠EDC的数量关系一定正确的是( )
![](https://img.xkw.com/dksih/QBM/2022/3/15/2936846210908160/2938943297331200/STEM/f2226fbe24904c738372c1d6be9e6fb9.png?resizew=175)
![](https://img.xkw.com/dksih/QBM/2022/3/15/2936846210908160/2938943297331200/STEM/f2226fbe24904c738372c1d6be9e6fb9.png?resizew=175)
A.∠EDC-![]() | B.∠ABE+![]() |
C.∠ABE=![]() | D.∠ABE+∠EDC=180° |
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10 . 某高校甲、乙两位同学大学四年选修课程的考试成绩等级(选修课的成绩等级分为1,2,3,4,5,共五个等级)的条形图如图所示,则甲成绩等级的中位数与乙成绩等级的众数分别是( )
![](https://img.xkw.com/dksih/QBM/2022/1/21/2899348862803968/2901325183295488/STEM/0ce07ec2-803e-44c6-a75b-3be00b162ee4.png?resizew=190)
![](https://img.xkw.com/dksih/QBM/2022/1/21/2899348862803968/2901325183295488/STEM/d198ab2e-ab73-448a-afa5-80a67588da81.png?resizew=191)
![](https://img.xkw.com/dksih/QBM/2022/1/21/2899348862803968/2901325183295488/STEM/0ce07ec2-803e-44c6-a75b-3be00b162ee4.png?resizew=190)
![](https://img.xkw.com/dksih/QBM/2022/1/21/2899348862803968/2901325183295488/STEM/d198ab2e-ab73-448a-afa5-80a67588da81.png?resizew=191)
A.3,5 | B.3,3 | C.3.5,5 | D.3.5,4 |
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2022-01-24更新
|
540次组卷
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10卷引用:河北省邯郸市十校联考2022届高三上学期期末数学试题