第8章 函数的应用
一、单项选择题:(本题共8小题,每小题5分,共40分.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/3a08039d881e14627105545c2b7a7c98.png)
A.![]() | B.![]() | C.![]() | D.![]() |
【知识点】 判断零点所在的区间
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/31/cd92ef31-b058-4694-9d61-8a8cea93865b.png?resizew=172)
A.4,4 | B.3,4 | C.5,4 | D.4,3 |
【知识点】 用二分法求方程的近似解
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61648c60b4195f21dc0fc493141c9147.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec3e3bcd67cf1a355986c6e3132470c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
【知识点】 根据函数零点的个数求参数范围
![](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/74ecba5d9fb091ce28b481f22aadeb96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/883860564200198b103d15f78a2a350c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9aabd59a4d426490f6ae9fb6f324acc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3304e23f3b0f9569c4140ca89b6498.png)
A.![]() | B.![]() | C.![]() | D.![]() |
【知识点】 利用给定函数模型解决实际问题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/605e938d9e262b52a4e1f7ef41308dad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c481871d281612bde814037282f547af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e15e00f40396e914d1d9955bd7785f1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e62e71d5038d20f53c8b94c3b22f877b.png)
A.![]() | B.![]() | C.![]() | D.![]() |
【知识点】 方程与不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2744a23391ba269df992bf4d0c2df5b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f7dbb416ec1ff1984a724a4f48bf692.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74ea7e5fa2b009388cc66bd8d816b615.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fc67d20018a0cdcf6676bb4d744a661.png)
A.![]() | B.![]() | C.![]() | D.![]() |
【知识点】 函数周期性的应用 奇偶函数对称性的应用 求函数零点或方程根的个数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a75ca11d04ec13b95744d9d3c324076f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecc7602223ad301131fa10f688f94823.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2b7c2420c387be8882df4359ac10b86.png)
A.![]() | B.![]() | C.![]() | D.![]() |
【知识点】 函数与方程的综合应用 根据零点求函数解析式中的参数
二、多项选择题:(本题共4小题,每小题5分,共20分.在每小题给出的选项中,有多项符合题目要求.全部选对的得5分,有选错的得0分,部分选对的得3分.)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37b3213404391071a6ffdae889587724.png)
A.0 | B.1 | C.2 | D.3 |
【知识点】 函数图象的应用 求函数零点或方程根的个数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/999fb5d086eb376d10725f9e91d4a008.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46aedf5f60db4f91ad77e371b0269c69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c754abe2d31c60e9239102e91249eeb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbaa5e29c3302b54e874cf7f45b48bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19292699dff3389ec4846da5114015f1.png)
A.60 | B.80 | C.100 | D.120 |
![](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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/8238fba9b391d01ceb071e78ee221035.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8238fba9b391d01ceb071e78ee221035.png)
A.![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
【知识点】 函数新定义
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24aafd5075fedc76f5ed26f86bcc52ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37b1ac4170c33f68a8734b172c51dcf0.png)
A.2 | B.3 | C.4 | D.5 |
【知识点】 函数与方程的综合应用 根据函数零点的个数求参数范围
三、填空题:(本题共4小题,每小题5分,共20分.)
![](https://img.xkw.com/dksih/QBM/2020/11/14/2592948481589248/2597833979592704/STEM/5636f46b-b680-40f5-b92a-99992216a55f.png)
【知识点】 利用二次函数模型解决实际问题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e9fdc1f8ed0ae44b54a9a2a3aca2db4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/2020/10/20/2575278530740224/2575849121030144/STEM/3f33fefaef1f474a853582259853ca3c.png?resizew=154)
【知识点】 基本不等式求和的最小值解读
![](https://img.xkw.com/dksih/QBM/2020/11/15/2593509890031616/2595868426690560/STEM/f1240d5662f54c02861a5873d4e79968.png?resizew=554)
四、解答题:(本题共6小题,共70分.解答应写出文字说明、证明过程或演算步骤.)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(1)现有三个奖励函数模型:①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40fc539cd64144c2f8c6b4cfe59ce2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36ebda28b54cced75794a9de8d94ab69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c14b116f18d937795b50c9184a70eafb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b25cad2a86142bdfd83bf5a4e201324.png)
(2)根据(1)中符合公司要求的函数模型,要使奖金额达到350万元,公司的投资收益至少要达到多少万元?
(1)据市场调查,若价格每提高1元,销售量将相应减少2000件,要使销售的总收入不低于原收入,该商品每件定价最多为多少元?
(2)为了扩大该商品的影响力,提高年销售量.公司决定明年对该商品进行全面技术革新和营销策略改革,并提高定价到
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb639f81fde0889b2d40540083dd0ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38eca760782d8f0d6b5a829e5fcdb9fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
【知识点】 基本(均值)不等式的应用解读
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22cc78b37777500c91ea388e31773548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc527467220d4ebbf64cb7fe69956bf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ded95209f95cb252b0ef6986faf75977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/031320f02152c69d77131014d17e0cf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc527467220d4ebbf64cb7fe69956bf3.png)
(1)若平均每趟快递车辆的载件个数不超过1500个,试求发车时间间隔t的值;
(2)若平均每趟快递车辆每分钟的净收益
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b1b572a053215a97884619cd54a0652.png)
【知识点】 利用给定函数模型解决实际问题 分段函数的值域或最值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2972af8c65701183de194c358b83256c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb4bfcfd87a693048f188663fd295fad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a27f742c0b274e784d4c57d3f86c15.png)
(1)写出年利润
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a55300ca4f2eee3edb6b5374310ce8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bfc339cf6dd66599db64fa3fa44e608.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bfc339cf6dd66599db64fa3fa44e608.png)
(2)年产量为多少万件时,小王在这一商品的生产中所获利润最大?最大利润是多少?
【知识点】 分段函数模型的应用 基本不等式求和的最小值解读
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3a7b72fbc65af4ec4f0a9493144bd44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf3b173a183e5b8d81d8bcfa3bfc7248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/533a7b702ada1dd80123e4041271d521.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caa585b9257ed0798213a9ae9b87d291.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
【知识点】 分式型函数模型的应用 基本(均值)不等式的应用解读
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a27ccc6d3290f403dba4ecd1fd2e3725.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54078c4af5b305e26b8e3faa6423e67e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f16faab62a88a02039ef5eea4d09dcb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eefcb87d40ed2a2aca4460f2de66356e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb87c830a03204a5b783ad4c2ba49c4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)