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1 . 智能主动降噪耳机工作的原理是通过耳机两端的噪声采集器采集周围的噪声,然后通过主动降噪芯片生成的声波来抵消噪声(如图).已知噪声的声波曲线是
,通过主动降噪芯片生成的声波曲线是
(其中
),则
( )
![](https://img.xkw.com/dksih/QBM/2022/6/2/2992613741322240/2995556339048448/STEM/1855190a-5f8f-47fc-bf4b-ffb832947ca0.png?resizew=283)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b7cd93b34f15e13f2308a8c3ebf3d99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b659146043ee17e549578998318b2c12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ca83975f6ac01787d50e522de803400.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46626b75bd7bc420bf32b66e3253b40b.png)
![](https://img.xkw.com/dksih/QBM/2022/6/2/2992613741322240/2995556339048448/STEM/1855190a-5f8f-47fc-bf4b-ffb832947ca0.png?resizew=283)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2022-06-06更新
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480次组卷
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7卷引用:四川省宜宾市叙州区第一中学校2024届高三上学期期末数学(理)试题
解题方法
2 . 高斯被誉为历史上最伟大的数学家之一,高斯函数
也被广泛应用于生活,生产的各个领域,其中
表示不超过x的最大整数,如:
,
.若函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6cfebbccb2a84379c3043b2d6db2721.png)
,则
的值域为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1550a97c21c1d71c9e95dde569668be0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4f5908d6a1217e493ed7586b6964dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cce9e17aca4a8df43c089cdf92e293e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c6c3e908073982771087c1f269081b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6cfebbccb2a84379c3043b2d6db2721.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e1117876a2051150092c4c9ded5fb6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa7a84d7e5d6236009a8be655bd500fd.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2022-01-25更新
|
511次组卷
|
2卷引用:四川省宜宾市2021-2022学年高一上学期期末数学试题