1 . 为深入学习宣传党的二十大精神,某校开展了“奋进新征程,强国伴我行”二十大主题知识竞赛.其中高一年级选派了10名同学参赛,且该10名同学的成绩依次是:70,85,86,88,90,90,92,94,95,100.则下列说法正确的序号为_______ .(写出全部正确的序号)①中位数为90,平均数为89;②极差为30,方差为58.③70百分位数为92;④去掉一个最低分和一个最高分,平均数变大,方差变小
您最近一年使用:0次
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解题方法
2 . 函数
,关于函数
的零点情况有下列说法:
①当
取某些值时,无零点; ②当
取某些值时,恰有1个零点;
③当
取某些值时,恰有2个不同的零点; ④当
取某些值时,恰有3个不同的零点.
则正确说法的全部序号为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f24bd5843cbfaff1885592a83275ad7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c2853174cf50c71d58b7d57d7048088.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
③当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
则正确说法的全部序号为
您最近一年使用:0次
2024-03-27更新
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163次组卷
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2卷引用:北京市第一六六中学2023-2024学年高一上学期数学期末模拟试卷
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3 . 下列说法中正确的有_______ (填正确说法的序号).
①回归直线
恒过点
,且至少过一个样本点;
②若样本数据
的方差为4,则数据
的标准差为4;
③已知随机变量
,且
,则
;
④若线性相关系数
越接近1,则两个变量的线性相关性越弱;
⑤
是用来判断两个分类变量是否相关的随机变量,当
的值很小时可以推断两个变量不相关.
①回归直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/929ef3bed0a4bdd22f39e036506dc481.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bda105ec292aac7ab1485bd5031783fb.png)
②若样本数据
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ce0b4b61f09ac4f5e16b40f7c608402.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/044cd011370eb6e1c50f4b701bfe5120.png)
③已知随机变量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90f12392733f7d31b5dadaa7ec2e190.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f008a4d0dc886d0138ff98f78686b2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/452ac2a59d469cb71f5ef336aa901233.png)
④若线性相关系数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fe9be2c6b3d8bf1e6ce9e9c0025ced7.png)
⑤
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b986e3613290b456532843d5ad4c6e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b986e3613290b456532843d5ad4c6e67.png)
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解题方法
4 . 已知两条不重合的直线
和
,两个不重合的平面
和
,下列四个说法:
①若
,
,
,则
②若
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80645381feb9746cc149da61d553974a.png)
③若
,
,
,则
④若
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84b6e422b2e6f6dada4d8c369559a077.png)
其中所有正确的序号为( )
![](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/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6a4c549e7ea8776ec821c467bc1a913.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9d6ca6fed060a95127579051f7a6b79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80645381feb9746cc149da61d553974a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/384a65ca1ee3d7d86b988ca34c885e18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/384a65ca1ee3d7d86b988ca34c885e18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6a4c549e7ea8776ec821c467bc1a913.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9d6ca6fed060a95127579051f7a6b79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80645381feb9746cc149da61d553974a.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fe920cd78db25f5b4df37d066e57800.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a53cd751c44ad4d9ebd8e3243e751321.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80645381feb9746cc149da61d553974a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/384a65ca1ee3d7d86b988ca34c885e18.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84b6e422b2e6f6dada4d8c369559a077.png)
其中所有正确的序号为( )
A.②④ | B.③④ | C.④ | D.①③ |
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2024-03-07更新
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898次组卷
|
4卷引用:山东省聊城市2024届高三上学期期末教学质量检测数学试题
山东省聊城市2024届高三上学期期末教学质量检测数学试题江苏省徐州市沛县第二中学2024届高三下学期期初测试数学试题(已下线)热点6-1 线线、线面、面面的平行与垂直(6题型+满分技巧+限时检测)2024届广东省新改革高三模拟高考预测卷三(九省联考题型)数学试卷
名校
解题方法
5 . 某重点高中110周年校庆学校安排了分别标有序号为“1号”“2号”、“3号”的三辆车,等可能的随机顺序前往酒店接嘉宾.某嘉宾突发奇想,设计了两种乘车方案.方案一:不乘坐第一辆车,若第二辆车的序号大于第一辆车的序号,就乘坐此车,否则乘坐第三辆车;方案二:直接乘坐第一辆车.记方案一与方案二乘坐到“3号”车的概率分别为
,
,则
,
分别为( )
![](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/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
A.![]() ![]() | B.![]() ![]() | C.![]() ![]() | D.![]() ![]() |
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2021-10-30更新
|
388次组卷
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4卷引用:河北省石家庄市第二十二中学2023-2024学年高二上学期期末数学模拟试卷
河北省石家庄市第二十二中学2023-2024学年高二上学期期末数学模拟试卷(已下线)专题11 概率归类(2) -期末考点大串讲(苏教版(2019))湖北省东南联盟2021-2022学年高二上学期10月联考数学试题湖北省黄冈市红安县第一中学2022-2023学年高二上学期9月月考数学试题
名校
解题方法
6 . 已知
的展开式中第5项与第7项的二项式系数相等,且展开式的各项系数之和为1024,以下结论,正确结论的序号为______
①展开式中奇数项的二项式系数和为256
②展开式中第6项的系数最大
③展开式中存在常数项
④展开式中含
项的系数为45
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea163cfc46cf596ff7af2fcb57fdd19.png)
①展开式中奇数项的二项式系数和为256
②展开式中第6项的系数最大
③展开式中存在常数项
④展开式中含
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56133575d40e3dc9d767b79be8a9ccf0.png)
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昨日更新
|
128次组卷
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2卷引用:山东省泰安市新泰市第一中学东校2023-2024学年高二下学期第二次质量检测数学试题
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解题方法
7 . 已知四边形
是椭圆
的内接四边形,其对角线
和
交于原点
,且斜率之积为
.给出下列四个结论:
①四边形
是平行四边形;
②存在四边形
是菱形;
③存在四边形
使得
;
④存在四边形
使得
.
其中所有正确结论的序号为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caeb11677994ba487096958b1ad82ea1.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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f30d314a642667fef559032264647366.png)
①四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
②存在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
③存在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e84f14a77c27b015b6b1cf0896228b1.png)
④存在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d8d582c0bf83314b19df67e1bd2740.png)
其中所有正确结论的序号为
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2024-01-17更新
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289次组卷
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3卷引用:北京市海淀区2023-2024学年高二上学期期末练习数学试卷
北京市海淀区2023-2024学年高二上学期期末练习数学试卷北京市人大附中2023-2024学年高二上学期期末数学试题(已下线)2.2.2 椭圆的性质(十八大题型)(分层练习)-2023-2024学年高二数学同步精品课堂(沪教版2020选择性必修第一册)
2024·全国·模拟预测
名校
8 . 已知点
是函数
(
,
,
)图象上的一个最高点,
是函数
的一个零点,且
与
之差的绝对值的最小值为
.将
的图象向右平移
个单位长度后得到函数
的图象,且
是奇函数.给出下列结论:①
;②
在区间
上的值域为
;③
的单调递增区间为
,
.其中所有正确结论的序号为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6498b37e4655344a59a14ec056c30cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68ae6678d22dc7b9125533b2c873b9e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13378be06b6b01bcad1d261ff14e87cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4456675a5dbe545462a22cef9aca8fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb61a448347a3f8c1f126d1c00730cc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd86badb20015aa65328fda1e43a117.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15615de1a6df206dbd081251f676578e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aeb076bad84890e24dbdc945ad543cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/028517e8bebe634441e0a5c79828e88a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/028517e8bebe634441e0a5c79828e88a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d65108e550865eaf3677ab3cd9d8db32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b69562f35e89bf9501a1a1ca5bc60a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ff44fbe4843a15dd8170d2e1f7eb59e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd81306c288447bde17f51db79afb1a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0992ffada4a9e62f05d5ea26cbf7e85d.png)
您最近一年使用:0次
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解题方法
9 . 已知
为等差数列
的前n项和,
为其公差,且
,给出以下命题:
①
;②
;③使得
取得最大值时的n为8;④满足
成立的最大n值为17
其中正确命题的序号为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b2c87f9f5cf3c2e13c4e761eb5d36b4.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2d8bbb4a09e0ac86bbae46222a90841.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5084a907d0a5aab9003b5b342ce14c2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49763402b2f2023f0ba64c37924267d3.png)
其中正确命题的序号为
您最近一年使用:0次
解题方法
10 . 给出下列命题
(1)命题“
,
”的否定是“
,
”
(2)若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b804002ee3d72ff947cfc8426f90047c.png)
(3)已知
,
,若
,则a的取值范围是![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a568a870b0c247e1abaf4bf65b83865.png)
其中正确命题的序号为( )
(1)命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ad5fe274cfc8da2dacfb65801f344ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9490565d4714ffcbadb26fdfca443856.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ccd7af9298cd5ff19d8866fedb42ec4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9490565d4714ffcbadb26fdfca443856.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b804002ee3d72ff947cfc8426f90047c.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0820285d82c98efc92ee43db58418fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f4cde12869125b1eebc2c6c8ae22cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96f1ba0a1129741502600e47bf058c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a568a870b0c247e1abaf4bf65b83865.png)
其中正确命题的序号为( )
A.(2)(3) | B.(2) | C.(1)(3) | D.(1)(2) |
您最近一年使用:0次