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1 . 定义在R上的偶函数
满足对任意
,有
,且当
时,
,若函数
在
上至少有3个零点,则实数
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c050a5d2d252feb0ac14e84d579dec73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3af98533fbc91ae52c1eeaf0592a86f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cf8a952a12ed387c36b6b6f9b884edf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/808ed6f1ef47c4537fceea19e7c38062.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8938db94f49dcbe0c383fba0241bb0da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2021-06-23更新
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2525次组卷
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5卷引用:四川省雅安中学2020-2021学年高二下学期期中考试数学(理)试题
四川省雅安中学2020-2021学年高二下学期期中考试数学(理)试题(已下线)第四章 指数函数与对数函数(选拔卷)-【单元测试】2021-2022学年高一数学尖子生选拔卷(人教A版2019必修第一册)福建省龙岩第一中学2021-2022学年高一上学期第三次月考数学试题(已下线)专题2-3 函数性质3:幂指对函数图像与零点-2(已下线)专题05 二次函数(讲义)-1
2 . 定义函数
为不大于
的最大整数,对于函数
有以下四个命题:①
;②在每一个区间
,
上,
都是增函数;③
;④
的定义域是
,值域是
.其中真命题的序号是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c869d028955cafb32907bef1b6fe31cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09848973ee6c1a778ca6358e35da42d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/594745d32fc6a45602a6f4bc97c99761.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99074f989e74d5ff306b4b7b7a379c1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9274aa1e83cf5ffc5cd62e6811f036d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ae66c5401deed7341470ca37800463.png)
A.③④ | B.①③④ | C.②③④ | D.①②④ |
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