1 . 为响应“强身健体,智慧学习”倡议,复兴中学开展了一次学生体质健康监测活动.已知高三(2)班有50名学生,其中男生28人,女生22人,按男生、女生进行分层,用分层随机抽样的方法,从高三(2)班全体学生中抽取一个容量为25的样本.如果各层中按照比例分配样本,则
(1)女生应抽取的人数为_________ 人;
(2)已知样本中男生、女生的平均体重分别为
和
.估计高三(2)班全体学生的平均体重为_________
(精确到
).
(1)女生应抽取的人数为
(2)已知样本中男生、女生的平均体重分别为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bdc4d3f86e0b9d3fa58da9c9aaa55d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a625fb8d31400d4c74e7f911119c26e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24f7c4a8558eff6427d22b6c0c855721.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1cff05f157a2fbfbfbe0b9f06bff1ae.png)
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2 . 沈括的《梦溪笔谈》是中国科技史上的杰作,其中收录了计算圆弧长度的“会圆术”.如图,
是以
为圆心
为半径的圆弧,C是
的中点,D在
上,且
.记
的弧长的近似值为
,“会圆术”给出了的一种计算公式:
.若
,
,则根据该公式计算![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9c7e7449010436e00dce3b6924a4258.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5873c01192b7d33b7483f444f90b5b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3253e96db1fd7ef249769c92f391cf98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52705567101a48893de582656ef41527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ccc37b189fa2cbc269ca0b233dac37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9c7e7449010436e00dce3b6924a4258.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/27/5f731085-7d9f-48ba-94f1-b475e223405d.png?resizew=395)
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2023-11-06更新
|
548次组卷
|
4卷引用:2023年湖北省普通高中学业水平合格性考试数学试题
2023年湖北省普通高中学业水平合格性考试数学试题(已下线)5.1.2 弧度制同步精品课堂(人教A版2019必修第一册)(已下线)模块四 专题2 题型突破篇 小题进阶提升练(1)期末终极研习室(2023-2024学年第一学期)高一人教A版四川省泸州市蔺阳中学2023-2024学年高一上学期12月月考数学试题
解题方法
3 . 已知m,n是两条不同直线,
,
是两个不同平面.给出下列四个论断:
①
;②
;③
;④
.
以其中三个论断作为条件,余下一个论断作为结论,写出一个正确命题:若_________ ,则_________ .(注:用序号作答 )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84b6e422b2e6f6dada4d8c369559a077.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5986f2991d45fbf3578f08f27d9fd7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fe920cd78db25f5b4df37d066e57800.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a53cd751c44ad4d9ebd8e3243e751321.png)
以其中三个论断作为条件,余下一个论断作为结论,写出一个正确命题:若
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解题方法
4 . 已知两个单位向量
与
的夹角是
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bd01707e8d32f277b83c007a5b15bd7.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bd01707e8d32f277b83c007a5b15bd7.png)
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名校
5 . 若关于
的一元二次方程
有两个不相等的实数根
,且
.
(1)下列说法正确的有__________ .(将正确选项的序号填在横线上)
①若
,则
,
②
,
③若
,则
,
④若
,则
.
(2)某数学兴趣小组为了增加此题的趣味性,将题目改成:若关于
的方程
有两个不相等的实数根
,且
,其中
均为整数,则
的最小值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92b800b7d6a688abf8a3018c133cec9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aca579894dad67bc82cb715fd48e0d70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb5ffa21fddc7c55d35f13435792b2d4.png)
(1)下列说法正确的有
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2fe3251e054fe97089806ba7033f802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f75807858b7804a1ad2039c41f323a18.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/badd7f3edb52106b897fe62c9e9ada2e.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4d57bdb85ad21a427ebc3126fab41ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c56b1ee18c6809b339d980671b4d09a.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a066bbbcf164565325c66d9e5f500d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc1adacd10539c74b82fc1e6e88ea6f6.png)
(2)某数学兴趣小组为了增加此题的趣味性,将题目改成:若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9c0dce1f975d1203a1bff7580a892d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097f28b6443848c98413364953c37ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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名校
6 . 如图,在四边形
中,
,
是线段
上的一动点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/22/ff6b5f4f-b48d-49d8-9823-001f3a462dbc.png?resizew=173)
(1)当
时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17509fe66cab7e264f4e3a30c20f7de4.png)
__________ .
(2)当
时,点
到
的距离是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ebb33adb2310a6e03918761e68204a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10ebe861b338f75da0c90872a79f8315.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/22/ff6b5f4f-b48d-49d8-9823-001f3a462dbc.png?resizew=173)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50f218914337edd06e59e75d90b777e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17509fe66cab7e264f4e3a30c20f7de4.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1d2231c7a2875ab6d423dff3ead4069.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
您最近一年使用:0次
名校
7 . 如图,
两点在双曲线
上,
两点在双曲线
上,若
轴,且
,则
的面积为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6114947179bed8c2c86ac078e2f8497f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2311a0e8fe086ac4bfa89b75417da00b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ebaa32f4f1f4f807ca9aeb7fb29951.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db27d050c1f126c5b94b2e3b22a14f35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20cd2fd2fbb51a162b1054b531daaa9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b417db3873f3e6d0e9cd235a4ef685a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4807ca16360c0cca436e59d4be98f626.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/22/221ac969-cb33-47cb-bbd6-b6a29bd9c582.png?resizew=160)
您最近一年使用:0次
名校
8 . 已知
,则代数式
的值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf4f277d11a202093539883ffeae4445.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdeaee3b9af3fead1cfa7bcbc721417b.png)
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名校
解题方法
9 . 设
,
,记
,
,
分别为a,b的算术平均数、几何平均数、调和平均数,古希腊数学家帕波斯于公元4世纪在其名著《数学汇编》中研究过
时A,G,H的大小关系,则A,G,H中最大的为______ ,最小的为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eafe09fa892efa1d5f25f4c19cc298d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7538eabbe59e268c4768fec1e6f7319.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92489dfe55a11464ed1cdbafb2984d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2958030ec9d7543dda1f529593a915e2.png)
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2022-08-30更新
|
524次组卷
|
5卷引用:2020年湖北省普通高中学业水平合格性考试数学试题
10 . 将一枚质地均匀的骰子连续抛掷两次,向上的点数依次记为
、
,则使得函数
在区间
上不单调且该函数与
轴交点的纵坐标大于1的概率为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d3bb66075e223c878a9471a70c3f70b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/189b2da6c420bf8f8900002d14f65f72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
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