1 . 关于函数
,
.有下列命题:
①对
,恒有
成立.
②
,使得
成立.
③“若
,则有
且
.”的否命题.
④“若
且
,则有
.”的逆否命题.
其中,真命题有_____________ .(只需填序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1804c8cc2797e07d5a08f480ea0b69e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24c1725419831f88c329060f32aaba39.png)
①对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c780149aef1bd77162e85f7f8906a6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05fce924911d5ed93147dfce9e41c2b0.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df0f740d59c99697fc0c5ed11c5e3ed3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ca3b1f02a33e3370d59d60cf58682a6.png)
③“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/937988f56df076efe4af424c79527266.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e10e1c43b86a8cd4360ca9b57232164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
④“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e10e1c43b86a8cd4360ca9b57232164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d137d6a2b1f4420df4d475e40081f680.png)
其中,真命题有
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2019-12-23更新
|
296次组卷
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2卷引用:重庆市云阳县2019-2020学年高二上学期期中考试数学(文)试题
17-18高二·全国·课后作业
名校
2 . 已知命题“若m-1<x<m+1,则1<x<2”的逆命题为真命题,则m的取值范围是__________ .
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