对于定义在
上的函数
和
,有下面几个命题:
①若
,当n为奇数时,函数
是奇函数;
②若
,当n为偶数时,函数
是偶函数:
③存在正奇数n和奇函数
,满足对任意的x,都有
;
④存在正偶数n和偶函数
,满足对任意的x,都有
;
⑤存在正整数n,使得
与
均为单调函数,其中
,
.
其中真命题的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d188ec2580e273ce87e51653a2177ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75a8a604167be42eb1b3f261753b3446.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75a8a604167be42eb1b3f261753b3446.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
③存在正奇数n和奇函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a62cfda8feba53823ef7b00708534590.png)
④存在正偶数n和偶函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a62cfda8feba53823ef7b00708534590.png)
⑤存在正整数n,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b41e41598c9a0c567bb7fa23dae6df59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a62cfda8feba53823ef7b00708534590.png)
其中真命题的个数是( )
A.2个 | B.3个 | C.4个 | D.5个 |
20-21高三上·上海宝山·阶段练习 查看更多[4]
上海市交通大学附属中学2021届高三上学期10月月考数学试题(已下线)重难点03 三角函数值的求值技巧-2021年高考数学【热点·重点·难点】专练(上海专用)(已下线)模块06 三角函数-2022年高考数学一轮复习小题多维练(上海专用)(已下线)第7章《三角函数》 培优测试卷(二)-2021-2022学年高一数学上册同步培优训练系列(苏教版2019)
更新时间:2020-10-29 00:22:27
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A.函数![]() ![]() |
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D.函数![]() ![]() |
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名校
【推荐2】设函数
的定义域为
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A.0 | B.2014 | C.4028 | D.4031 |
您最近一年使用:0次
单选题
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较难
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解题方法
【推荐1】已知函数
,
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78b4d2cdbc9e45cbc12c47747e6f5314.png)
A.![]() ![]() | B.![]() ![]() |
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|
较难
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C.当![]() ![]() ![]() | D.若![]() ![]() ![]() |
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