1 . 已知集合
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b9b470218359a4a47be9244980489e.png)
____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/714c5323c297f78aba53ae9da7ed791f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/633e847066189f4a1926d0b3289fe086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b9b470218359a4a47be9244980489e.png)
您最近一年使用:0次
解题方法
2 . 已知集合
,
,若
,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77b3e91726e128faf553d4daf8a66218.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c2c908a191c6ec7b577941b66439967.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caf22d7d1a965bda25168a233fb6290c.png)
您最近一年使用:0次
3 . 下列四个命题中,正确的有( )
①两个变量间的相关系数
越小,说明两变量间的线性相关程度越低;
②命题
:“
,
”的否定
:“
,
”;
③用相关指数
来刻画回归效果,若
越大,则说明模型的拟合效果越好;
④若
,
,
,则
.
①两个变量间的相关系数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f435efcc7869eec21bdba1ed81dc3f5.png)
②命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13a267dc35d17d6d8c6aaea35e9c79bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7d06720eea2022e5cc8cf1e122df7e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63011498e73731346645de7100f55ab3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a976d91358362fa49d6da8021fd47e2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2f0889777cab6ac15fddbdea80335d2.png)
③用相关指数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c85067c53e936ef32da818efe04bdbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c85067c53e936ef32da818efe04bdbb.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e87490c3c871f06ed588467319792ba5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b761fd995881a8039dc2d7e82f3a6210.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/580a5421a751b8cc53a8c1a4be0c0322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15440cdb83a72daf55b03fd07e0abca3.png)
A.①③④ | B.①④ | C.③④ | D.②③ |
您最近一年使用:0次
名校
解题方法
4 . 已知
,那么“
”是“
”的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/360ff131c51a4ef6745538c18cec92c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/228de9000148fa8e41fe843ffdfedae5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a75cbcae038bb2a0488f528eef730aa9.png)
A.充分不必要条件 | B.必要不充分条件 |
C.充要条件 | D.既不充分也不必要条件 |
您最近一年使用:0次
2024-07-29更新
|
411次组卷
|
3卷引用:吉林省通化市三校联考2023-2024学年高二下学期期末考试数学试题
解题方法
5 . 设集合
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4347b35d6ef37e73ccf89174d2c9482f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40340322abc71f23a3d792f3dc944987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/715476727accc3c6b3c71f2f25c3aaad.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
6 . 已知集合
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12e0f949f56580a62d7a6c3e3961b0c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d65c014de9e711c6c52d0a8018feab8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1336d38741aab2255a35c26612bbd7cc.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
7 . 设集合
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9705d74b5d058ab27d1426eaaf89804b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a6845b284a9b8eb306ea453fe70fc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b9b470218359a4a47be9244980489e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
8 . 下列不等式中,可以作为
的一个必要不充分条件的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/200849ce71f53c0321506e27de437b8d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024-07-26更新
|
1533次组卷
|
4卷引用:福建省长汀县第一中学分校2023-2024学年高二下学期5月月考数学试题
9 . 若
:
;
:
,则
是
成立的_______________________ 条件.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/200849ce71f53c0321506e27de437b8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cafe647840cc2ace0d94bdca3c4fb03d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
您最近一年使用:0次
10 . 设集合
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e0cfeeb86ee8c367e5cd782e7d08ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14448f0a8c8868408afbbb93af381c27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b9b470218359a4a47be9244980489e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次