题目
题型:解答题难度:简单来源:不详
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170622-39040.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170623-60552.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170623-87785.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170623-19319.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170623-15009.png)
若
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170624-61734.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170624-46827.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170624-47911.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170624-25671.png)
解析
试题分析:由
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170624-67581.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170625-77991.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170625-64868.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170625-26834.png)
若3-
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170624-46827.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170624-46827.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170624-46827.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170625-76980.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170624-46827.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170624-46827.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170625-58973.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170626-21651.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170626-82638.png)
(2)若3-
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170624-46827.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170624-46827.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170624-46827.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170625-76980.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170626-71503.png)
(3)若3-
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170624-46827.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170624-46827.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170624-46827.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170625-76980.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170624-46827.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170624-46827.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170627-42023.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170627-94814.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170628-58708.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170628-29687.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170624-47911.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170624-25671.png)
点评:中档题,集合作为工具,常常与函数、数列、不等式等综合在一起考查,关键是理解几何运算的意义。
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170620-28057.png)
A.(![]() | B.(![]() | C.(1,+∞) | D.(![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170617-13654.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170616-93282.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170606-28627.png)
(1)当
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170606-84690.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170606-45717.png)
(2)若函数
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170606-45717.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170606-87630.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170607-97357.png)
(3)当
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170607-64942.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170607-57820.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817170607-97357.png)
(1)求a,b的值;
(2)证明:f(x)≤2x-2.
最新试题
- 1将下列物质按酸、碱、盐分类依次排列正确的是 ( )A.硫酸、纯碱、石灰石B.硫酸、烧碱、胆矾C.石炭酸、石膏、醋酸
- 2你是否有这样的经历:撑一把雨伞行走在雨中,如图所示,一阵大风吹来,伞面可能被“吸”,严重变形.下列有关这一现象及其解释,
- 3图反映了我国近代民族资本主义的发展情况。假如图中的F1为阻力,F2为动力,其中F1>F2的情况出现于( )A.1895
- 4实验室用密度为1.18g·mL-1,质量分数为36.5%浓盐酸配制250mL0.1mol·L-1的盐酸溶液,填空并请回答
- 5主要的供能物质是( )A.脂肪B.维生素C.糖类D.蛋白质
- 6计算:(-1)2009-(π-3)0+4=______.
- 7我们曾做过a、木炭 b、硫磺 c、红磷 d、铝箔 e、铁丝 在氧气中燃烧的实验。其中产生浓厚的白烟的是 (填
- 8汽车在两车站间沿直线行驶时,从甲站出发,先以速度v匀速行驶了全程的一半,接着匀减速行驶后一半路程,抵达乙车站时速度恰好为
- 9现代文阅读:阅读下面的文章,完成后面题目。(共19分)九 公凡 夫你要是到村子里去打听九公,无论大人小孩几乎没有不知道的
- 10将下图中的小船向左平移4格.
热门考点
- 1A notice was placed by the river bank warning people to ____
- 2将一盆绿色植物水平放置,几天后发现根总向下生长,这说明根具有( )A.向水生长的特性B.向肥生长的特性C.向地生长的特
- 3下列句子中,没有语病、句意明确的一句是 ( )A.走进这举世闻名的繁华都市,看到林立的高楼大厦,无不使人深感自豪。
- 4阅读理解。 Almost everyone likes apple pies in the USA. An ap
- 5一静止在海面的潜水艇模型,在启动之后,4min内匀速竖直下潜20m,而后沿水平方向做匀速直线运动,又运动4min.请在图
- 6Modern science has given clear evidence ______ smoking can l
- 7 甲、乙、丙3位学生用互联网学习数学,每天上课后独立完成6道自我检测题,甲答题及格的概率为,乙答题及格的概率为,丙答题及
- 8我国探月工程计划之一是向月球发射月球车(如图所示).(1)发射月球车的火箭在穿越大气层时速度越来越快,那么,火箭受到的推
- 9已知函数f(x)在定义域(0,+∞)上为增函数,且满足f(xy)=f(x)+f(y), f(3)=1。(1)求f(9)、
- 10关于我国的宗教政策,下列说法正确的有A.宗教信仰自由是我国宪法规定的公民的一项基本政治权利B.我国政府反对宗教界的一切对