1 . 对
表示不超过x的最大整数,如
,我们把
叫做取整函数,也称之为高斯(Gaussian)函数,也有数学爱好者形象的称其为“地板函数”.在现实生活中,这种“截尾取整”的高斯函数有着广泛的应用,如停车收费、EXCEL电子表格,在数学分析中它出现在求导、极限、定积分、级数等等各种问题之中,以下关于“高斯函数的命题,其中是真命题有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a79d0ef3d3349bb02831ec03b28c32c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ae74d2017428576b719d343fc2cc8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd811db1d2290f60926afb262610d7d6.png)
A.![]() | B.![]() |
C.![]() ![]() ![]() | D.不等式![]() ![]() |
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2022-11-06更新
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1098次组卷
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5卷引用:广东省广州市铁一三校2022-2023学年高一上学期期中数学试题
广东省广州市铁一三校2022-2023学年高一上学期期中数学试题广东省执信中学2023-2024学年高一上学期10月月考数学试题广东省广州培才高级中学2023-2024学年高一上学期10月月考数学试题福建省三明市五县2023-2024学年高一上学期期中联合质检考试数学试题(已下线)专题03 函数的概念与性质3-2024年高一数学寒假作业单元合订本
名校
2 . 某校为促进学生积极参加体育锻炼,计划举办一次运动会,并为运动会设计了一款纪念品.如图所示为纪念品的平面图,其中四边形
为等腰梯形,A,B在
上,且
的半径为
,圆心
到
的距离为
,
,
.定义高径比
,已知当
时,纪念品的总体设计较为协调,符合大众审美.
![](https://img.xkw.com/dksih/QBM/2022/7/11/3020354608062464/3020432973848576/STEM/e2eb810e18dd4f6b92d007fcaacb31e1.png?resizew=145)
(1)设梯形
的高为
,求
关于
的函数关系式;
(2)当梯形
的面积
取得最大值时,判断该纪念品是否符合大众审美.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8fa37d1cbf6eb0cd960e9f0a4b91c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4604d0cbb14286c6d52be94d274fe37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdd837ded498831fbc65513b04e2e67f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6af2f597ea3f4dcfb89acb19a4ea6355.png)
![](https://img.xkw.com/dksih/QBM/2022/7/11/3020354608062464/3020432973848576/STEM/e2eb810e18dd4f6b92d007fcaacb31e1.png?resizew=145)
(1)设梯形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
(2)当梯形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
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2022-07-11更新
|
380次组卷
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2卷引用:福建省漳州市四校2021-2022学年高二下学期期末联考数学试题
3 . 如图,
为
的中线
上的点,且
,过点
的直线分别交
,
两边于点
,
,设
,
,请求出
,
的关系式,并记
.
![](https://img.xkw.com/dksih/QBM/2022/6/24/3008420752056320/3010629357903872/STEM/a49a7ae0f17d485e8dd41e0c867fdcd4.png?resizew=272)
(1)求函数
的表达式;
(2)设
的面积为
,四边形
的面积为
,且
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35d10a20d89032c23b0aaddc56e82cec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a291f84ab0281024c318dd9805831544.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42283f40f5ba3d7047f2c65dc7695f02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://img.xkw.com/dksih/QBM/2022/6/24/3008420752056320/3010629357903872/STEM/a49a7ae0f17d485e8dd41e0c867fdcd4.png?resizew=272)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9763846b1131e1e3e2d741ad95d5bb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cae996f17c142d99dd990efb01c39621.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/731d129699750d6d5f79a72e3444e96b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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