8.3 应用与建模 体重与脉搏
一、选择题:在每小题给出的四个选项中,只有一项是符合题目要求的.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8938db94f49dcbe0c383fba0241bb0da.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
A.多1斤 | B.少1斤 | C.多![]() | D.少![]() |
【知识点】 等差数列的简单应用 利用等差数列的性质计算
A.![]() | B.![]() |
C.![]() | D.![]() |
二、填空题(共5小题)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78d246ce5c5fe7c4c372ce9d497c0f90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44165805c9477000c83b902377ea3455.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://img.xkw.com/dksih/QBM/2015/6/24/1572141970948096/1572141976797184/STEM/a17b403e1d194106a3462f8df70547ea.png?resizew=20)
![](https://img.xkw.com/dksih/QBM/2015/6/24/1572141970948096/1572141976797184/STEM/09442e73b56d49c989e791eed82de91c.png?resizew=57)
![](https://img.xkw.com/dksih/QBM/2015/6/24/1572141970948096/1572141976797184/STEM/790e8cec089a4349b765b77b7ebf5209.png?resizew=79)
![](https://img.xkw.com/dksih/QBM/2015/6/24/1572141970948096/1572141976797184/STEM/a17b403e1d194106a3462f8df70547ea.png?resizew=20)
![](https://img.xkw.com/dksih/QBM/2015/6/24/1572141970948096/1572141976797184/STEM/a17b403e1d194106a3462f8df70547ea.png?resizew=20)
![](https://img.xkw.com/dksih/QBM/2015/6/24/1572141970948096/1572141976797184/STEM/a17b403e1d194106a3462f8df70547ea.png?resizew=20)
【知识点】 指数函数模型的应用(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4776c85b79df196f606d3ebf3697fbc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/773ca22fc12ade9e60dbc749ba5cfa73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c3948040e6c6c3b342a95519ecfee56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/723d0b8c527db966b42ee0773c3bb45b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61c388166862b3ccfcc7ca749ebe5949.png)
①定义域是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3ce5058825399b6c7c5969b8adbab1c.png)
其中正确的有
三、解答题(共5小题)
【知识点】 函数模型的应用实例 基本不等式求和的最小值解读
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0efba7147f5b9ced8bc4a72f0a9fb8af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1d2e5599453f8d4c04369bc8f79962.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d26e1e398a4611df33bdebb4f4626ad5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
![](https://img.xkw.com/dksih/QBM/2019/7/15/2247297442611200/2247335763386368/STEM/0d3324be-6cde-4b42-867d-805714b1a4c5.png)
(1)求容器中防蚊液的体积
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)如何设计
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/436a25a5007b4f98262f8e8311e6acfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/773d6c844b53723fdedc57815e81517f.png)
(1)求2021年的利润
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06daa8ed58287978ddb9177cc0642ded.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)2021年产量为多少(千部)时,企业所获利润最大?最大利润是多少?
【知识点】 分段函数模型的应用 基本(均值)不等式的应用解读
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52f05b15e6994dd860b1959dc9da428.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03ebd46076dba1576bd948c6ed84af1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ded95209f95cb252b0ef6986faf75977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39d9bdf02e586fc751b5f9e0107d5ea6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03ebd46076dba1576bd948c6ed84af1e.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/090182a14a5e4ec8163ac6a8a658d63c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/090182a14a5e4ec8163ac6a8a658d63c.png)
(2)若该线路每分钟的净收益为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c1a2bef8f80ef59661ae3abce9dd8b1.png)
【知识点】 分段函数模型的应用 利用给定函数模型解决实际问题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d14af8de7575341e02ee92cd0e33312b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/5f26a860-9ca0-48f8-9d0f-d2747e2eb17b.png?resizew=180)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11db4b9921a9fe4d5c03b17bafc852fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5224a7da7fe6bc28971ce4c277f88588.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5224a7da7fe6bc28971ce4c277f88588.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6ed8259083f766ddf4ee64b3b92e274.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a76b8027a664ebe27b23e6842cbb9fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
【知识点】 三角函数在生活中的应用解读