题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045009-16604.png)
(Ⅰ)当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045009-86622.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045010-32955.png)
(Ⅱ)若
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045010-32955.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045010-85056.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045010-68451.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045010-97197.png)
解析
试题分析:(Ⅰ)首先确定函数的定义域(此步容易忽视),把
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045009-86622.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045011-86602.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045011-79830.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045010-68451.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045011-77496.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045011-52956.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045011-77496.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045010-32955.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045010-85056.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045011-10238.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045012-35380.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045012-21433.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045012-35380.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045010-68451.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045010-68451.png)
试题解析:(Ⅰ)函数的定义域为
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045012-89295.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045012-92372.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045013-99218.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045013-59291.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045011-86602.png)
x | (0,![]() | ![]() | (![]() |
![]() | - | 0 | + |
![]() | ![]() | 极小值 | ![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045014-91266.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045010-32955.png)
(Ⅱ)由已知,得
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045014-54115.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045011-79830.png)
若
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045009-86622.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045014-76013.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045015-58756.png)
若
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045015-96473.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045010-32955.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045010-85056.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045011-10238.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045012-35380.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045012-21433.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045012-35380.png)
即
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045015-95551.png)
故
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045015-27820.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045016-34588.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045016-84253.png)
∴实数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045010-68451.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045010-97197.png)
另解: ∵函数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045010-32955.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045010-85056.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045016-67510.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045016-41192.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045012-35380.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045012-21433.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045012-35380.png)
设
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045016-70875.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045017-90466.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045017-26249.png)
若
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045017-39326.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045017-87663.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045018-12852.png)
若
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045018-19157.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045018-65160.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045018-55808.png)
若
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045018-19396.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045019-90541.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045018-65160.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045019-67241.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045019-98691.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018045019-67241.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018044957-35311.png)
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018044957-98267.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018044958-57595.png)
(2)是否存在实数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018044958-25606.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018044958-77516.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018044958-25606.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018044949-58531.png)
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018044949-34983.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018044949-68989.png)
(2)当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018044949-62001.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018044949-84990.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018044949-15735.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018044933-78495.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018044933-76417.png)
(Ⅰ)当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018044934-34139.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018044934-68111.png)
(Ⅱ)若函数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018044934-68111.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018044933-76417.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018044934-68111.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018044921-38127.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018044921-95554.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018044922-36647.png)
(Ⅰ)讨论函数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018044922-69363.png)
(Ⅱ)若
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018044922-11070.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018044922-31676.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018044923-34218.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018044913-67874.png)
最新试题
- 1下列各项中,能正确表示食物链的是 [ ]A.蝗虫→青蛙→蛇 B.草→蝗虫→青蛙→蛇 C.草←蝗虫←青蛙←蛇 D.
- 2设非空集合A, B满足AB, 则 ( )A.x0∈A, 使得x0BB.x∈A, 有x∈BC.x0∈
- 3分解因式:x2+6x+9=( )。
- 4在探究功与速度变化的关系的实验中,我们并不需要测出橡皮筋做的功到底是多少,只需测出以后各次实验时橡皮筋对小车做的功是第一
- 52010年中国人民银行统计司就城镇居民对物价的满意程度进行了抽样调查,结果如图所示,据此估计2010年城镇居民中对物价水
- 6Sorry, I have no time ____ ; I can’t help you right now.A.no
- 7下列的动物中,属于昆虫的是①蜘蛛 ②蚊 ③蟹 ④蝇 ⑤虾 ⑥蝗虫 ⑦蜈蚣 ⑧蜻蜓[ ]A.①②③④B.①⑤⑥⑦C
- 8颗粒氧是养鱼专业户常常用到的物质,其主要成分是过氧化钙(化学式为CaO2)。取颗粒氧10g,加入到足量的水中,共生成1.
- 9默写(18分)1、 ,莲动下渔舟。2、晴川历历汉阳树, 。3、 ,回车叱牛牵向
- 10在学校组织的科学常识竞赛中,每班参加比赛的人数相同,成绩分为A,B,C,D四个等级,其中相应等级的得分依次记为90分,8
热门考点
- 1、材料一 中医是我国独有的传统医学,它借用五行学说来说明人体组织结构,用金、木、水、火、土分别对应肺、肝、肾、心、脾等
- 26月5日是世界环境日,下列有关环境与能源的说法正确的是( )A.焚烧塑料是减少白色污染的有效方法B.目前氢能源没有广泛
- 3写出下列朝代的开国皇帝、都城和建立时间。
- 4下列对灵渠这一水利工程的描述,正确的有①最初起到了补充兵员和军需物资的作用②促进了秦国农业发展,使东方六国难以抗衡③第一
- 5下图为某酶在不同温度下反应曲线和时间的关系,从图中不能获得的信息是 [ ]A.酶反应的最适温度 B.酶因热而失活
- 6有这样一个故事:有一个年轻人跋涉在漫长的人生路上,到了一个渡口的时候,他已经拥有了“健康”、“美貌”、“诚信”、“机敏”
- 7“五十六个民族,五十六朵花,五十六个兄弟姐妹是一家。”各民族都为中华文化的灿烂辉煌做出了重要贡献。我国五十六个民族之一的
- 8甲、乙两个白炽灯泡,甲灯泡上标有“220V 100W”字样,乙灯泡上标有“220V 40W”字样。 (1)比较两灯泡的灯
- 9下列物质都是常见的食品添加剂,但使用时必须严格控制用量的是[ ]A.NaNO2B.食醋 C.蔗糖 D.料酒
- 10某同学设计了一个测定激光的波长的实验装置,如图所示.激光器发出的一束直径很小的红色激光进入一个一端装双缝、另一端装有感光