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1 . 关于函数
,有以下四个结论:
①函数恒有两个零点,且两个零点之积为
;
②函数恒有两个极值点;
③函数的极值点不可能是
;
④函数既没有最小值,也没有最大值.
其中正确结论的序号为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a83689428b86a82202c4d539a4615b4.png)
①函数恒有两个零点,且两个零点之积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
②函数恒有两个极值点;
③函数的极值点不可能是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
④函数既没有最小值,也没有最大值.
其中正确结论的序号为( )
A.① | B.② | C.③ | D.④ |
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2 . 已知空间两平面
,
和两直线
,
,则下列命题中正确命题的序号为__________ .
(1)
,
; (2)
,
;
(3)
,
; (4)
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35f747152f006301e03b643afb80195c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2fc5040618ca0e9ebbfe642838521f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dedfa42c16dd0aefa2928a6e41f3dba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1c763be9d20293e3c5ebde3b27e4588.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5986f2991d45fbf3578f08f27d9fd7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e867b50639ddf7995004fd57e11afb77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23a63f6aa604e3d7fc7ae8c7b587069a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46cf68d01051d4968cb8407e6d87f941.png)
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3 . 若定义在
上的函数
,其图像是连续不断的,且存在常数
使得
对任意实数
都成立,则称
是一个“
特征函数”.则下列结论中正确命题序号为__________ .
①
是常数函数中唯一的“
特征函数”;
②
不是“
特征函数”;
③“
特征函数”至少有一个零点;
④
是一个“
特征函数”.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6942e67b25fc7d2e0b140c5ee47c4305.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3992d93b8257ca1c354b4c47d7e7afb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/196027d4251842f18ad7a788e41e1383.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86b92b70365c63607daecdc8deb73ecf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/196027d4251842f18ad7a788e41e1383.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bff9681471371af6e3d0934caee1004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/196027d4251842f18ad7a788e41e1383.png)
③“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35ec2a086710bd96dd580768274db9f5.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/331d70266454df40256268b19b055a88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/196027d4251842f18ad7a788e41e1383.png)
您最近一年使用:0次
2018-03-07更新
|
308次组卷
|
2卷引用:江苏省泰州市泰州中学2019-2020学年高一上学期第二次检测数学试题
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4 . 下列说法中,正确的是( )
A.公式![]() ![]() ![]() |
B.回归直线![]() ![]() |
C.相关系数![]() |
D.对分类变量![]() ![]() ![]() ![]() ![]() ![]() |
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