题目
题型:解答题难度:一般来源:不详
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133836-63205.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133836-18387.png)
(Ⅰ)求
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133836-18387.png)
(Ⅱ)计算
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133836-80433.png)
(Ⅲ)设函数
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133836-61903.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133837-74735.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133837-50009.png)
(Ⅱ)
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133837-42517.png)
(Ⅲ)
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133837-64651.png)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133837-85590.png)
可求出
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133838-58400.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133838-54628.png)
由于
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133836-18387.png)
∴ 所以
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133838-94651.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133838-69169.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133836-18387.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133839-26711.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133839-64677.png)
由
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133839-64042.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133839-66509.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133836-18387.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133837-50009.png)
(II)由于周期为4,所以只需要求出f(1),f(2),f(3),f(4)的值,然后即可知
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133839-49753.png)
由(Ⅰ)知
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133840-15609.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133836-18387.png)
且
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133840-13332.png)
∴原式
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133840-36042.png)
(III)解本小题的关键是知道
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133840-84383.png)
函数
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133837-74735.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133840-13262.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133841-25878.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133841-92388.png)
函数
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133837-74735.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133840-13262.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133841-25878.png)
在同一直角坐标系内作出这两个函数的图象(如下图所示),
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133841-20307.png)
由图象可知:
1)当
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133841-43035.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133842-19587.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133840-13262.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133841-25878.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133837-74735.png)
2)当
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133842-30512.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133842-18833.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133840-13262.png)
直线
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133841-25878.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133837-74735.png)
3)当
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133842-48572.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133840-13262.png)
直线
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133841-25878.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133837-74735.png)
核心考点
试题【已知函数的图象过点(1,2),相邻两条对称轴间的距离为2,且的最大值为2.(Ⅰ)求的单调递增区间;(Ⅱ)计算;(Ⅲ)设函数,试讨论函数在区间[1,4]上的零点情】;主要考察你对正弦函数的图象与性质等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133830-58773.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133831-63767.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133831-12553.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133721-74089.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133722-43387.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133722-14495.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133658-54822.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133659-53124.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133659-90363.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133659-50605.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133616-21602.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133616-20018.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133617-25230.png)
(1)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133617-11214.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133617-93604.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133617-11214.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190910/20190910133613-12288.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
最新试题
- 1煮鸡蛋时不宜用以下哪种容器 [ ]A.银制容器B.不锈钢制容器C.陶制容器 D.铝制容器
- 2My name ______ Tim Hand. [ ]A. am B. is C. a
- 3为了贯彻落实国务院关于促进家电下乡的指示精神,有关部门自2007年12月底起进行了家电下乡试点,对彩电、冰箱 (含冰柜
- 42013年1月22日,工业和信息化部等12家单位联合发布《关于加快推进重点行业企业兼并***的指导意见》,央企将在这一轮的
- 5设NA代表阿伏加德罗常数,下列说法正确的是( ) ①.0.1 mol/L 硝酸钙溶液中 NO3- 的数目为 0.
- 6下列工厂均属于动力指向型的是A.制糖厂、水果罐头厂B.服装厂、石油化工厂C.卫星制造厂、电子装配厂D.炼铜厂、炼铝厂
- 7如图所示,一个半径为的圆过一个半径为2的圆的圆心,则图中阴影部分的面积为( )
- 8完成句子。1. 针对李明的英语学习刘老师提了很多好的建议。 Mrs Liu ______ Li Ming ___
- 9为期两天的亚太经济合作组织***会议第一次高官会2006年3月2日结束。会议确定了进一步加强合作、促进贸易投资和提高人类
- 1020世纪初,大大推动了全国资产阶级民主革命运动的革命政党是 [ ]A.华兴会B.光复会C.兴中会D.同盟会
热门考点
- 1具有双受精现象的植物是A.一切植物B.藻类植物C.蕨类植物D.被子植物
- 2目前,科学家打算合成一种“二重构造”的球形分子,方法是把足球型的C60分子融进足球型的Si60分子中,使外面的Si原子与
- 3Helen learns to dance three times a week. Now she dances ___
- 4请你根据以下要点提示写一篇题为 Chinese tea 的短文,向外国朋友介绍中国的茶文化。历史中国人种茶饮茶已有400
- 5下列句子中的标点符号使用都正确的一项是( )(2分)A.这翻滚的麦浪、这潺潺的溪水、这百鸟的鸣唱、这热闹的劳动场面
- 6请根据如图所示实验,回答问题.(1)A中仪器a的名称是_________.玻璃管中的现象是_________,反应的化学
- 7阅读下面一段文言文,完成试题(13分)钟繇字元常,举孝廉,除尚书郎、阳陵令,以疾去。辟三府,为廷尉正、黄门侍郎。是时,汉
- 8用化学用语表示:(1)2个氧原子__________;(2)钙离子_________;(3)天然气的主要成分______
- 9【题文】设,,则 ( )A.B.C.D.
- 10我县从今年1月1日起调整水价,每立方米水费上涨。据了解,实验中学去年11月份的水费是1800元,而今年2月份的水费是36