名校
1 . 下列说法中,正确的有______ .
①回归直线
恒过点
,且至少过一个样本点;
②根据
列列联表中的数据计算得出
,而
,则有
的把握认为两个分类变量有关系,即有
的可能性使得“两个分类变量有关系”的推断出现错误;
③
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类变量不相关;
④某项测量结果
服从正态分布
,则
,则
.
①回归直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/929ef3bed0a4bdd22f39e036506dc481.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bda105ec292aac7ab1485bd5031783fb.png)
②根据
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b72fcdc709e77910cd36a26369648b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9d7b638f9898764af4435e250d7956.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e117d019a1a43f9655754a081164c1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95c487ba8259608d3cb24fb594ffbd7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/213c6487d477c3b399355b0df748a394.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7f3af3f4d512364ec740e6ce12d75fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7f3af3f4d512364ec740e6ce12d75fd.png)
④某项测量结果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b734e8f1546481e3eb4976008a045de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0306ab7cad1530f99b9d6e1e01f7252.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83d018812218fe74569edec82f0c6c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/059cbd1c6c15fb7ae69860ebc2d7f9cc.png)
您最近一年使用:0次
2020-04-11更新
|
702次组卷
|
3卷引用:重庆市万州第二高级中学2021-2022学年高二下学期期末数学试题
2 . 定义全集
的子集
的特征函数
,这里
表示
在全集
中的补集,那么对于集合
、
,下列所有正确说法的序号是______ .
(1)
(2)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9035cc9d963cb84c8da6014a6e062f6b.png)
(3)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b52b4f24969673c863b5aff4fb6751ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2193c95efaedd61ff49a7ff91df9e97a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c093cbde3d3472d1f7f2b0dff2bc4881.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b52b4f24969673c863b5aff4fb6751ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c38edfcbc6d0348a9fc75376f629909.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a11863d06650c0adafb18d2909336e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9035cc9d963cb84c8da6014a6e062f6b.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6409ca7b7ab3c4aa4e0b9abc8d2cb066.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/749b06c4f14826c3b0a5b37e4356aa64.png)
您最近一年使用:0次
2020-02-23更新
|
1062次组卷
|
4卷引用:重庆市万州二中教育集团2022-2023学年高一上学期第一次质量检测数学试题
重庆市万州二中教育集团2022-2023学年高一上学期第一次质量检测数学试题湖南省衡阳县创新实验班2019-2020学年高一上学期期末数学试题(已下线)高一上学期期中考试填空题压轴题50题专练-举一反三系列上海市七宝中学、松江一中、松江二中2024届高三上学期11月联考数学试题
3 . 函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3db364cad05e1e70fb29743351bafc1.png)
(1)当
时,过原点
的函数
的切线方程为__________ ;
(2)当
时,若数列
满足:
.判断下列命题是否正确,正确的在括号内写正确,错误的写错误.
①
,都有![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1a5945ce5c2114af8c18718ca8dc899.png)
( )
②
,使得![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bf06dcd2cef3226b0663f5562eb423f.png)
( )
③
,使得![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33fa384c97d499ae7ca08320f684c432.png)
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3db364cad05e1e70fb29743351bafc1.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3c442579603164f3fc19458677d307.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9dc8a749985e8aae334a15da6d70f28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75369db7afe5feec5c95e960136cbf3b.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b78297a65e7fad69635b19928ecc10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1a5945ce5c2114af8c18718ca8dc899.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15aa2314541715f6be69251653ebf6da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bf06dcd2cef3226b0663f5562eb423f.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15aa2314541715f6be69251653ebf6da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33fa384c97d499ae7ca08320f684c432.png)
您最近一年使用:0次