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1 . 下列命题:①
;②
;③
;④
若
,则
的否命题,其中正确的结论是______ .(填写所有正确的序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bbc63eddf227cef3226d09b7ac033b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/405aa2b3947169fedd0c8af169fcbc8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1279a34f2bb9809633487d47b5383c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/853bd348db38586386c3cfaf9edfde6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eae9ba258299eb489b490594397e23c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
您最近一年使用:0次
2020-11-21更新
|
1093次组卷
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5卷引用:八省市2021届高三新高考统一适应性考试江苏省无锡市天一中学考前热身模拟数学试题
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2 . 已知函数
,
,对一切
,
恒成立,则实数
的取值范围为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17bc2b72b4457888935491da5c390c93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01110dd702a46375e962a7207cd26c7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92b44b3eceb73214ef7c12f39cdc09ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f3f4ce7c6b1682c61a307624d77b25b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2018-09-28更新
|
3069次组卷
|
6卷引用:江苏省高邮市2018届高三上学期期初考试数学(理科)