题目
题型:不详难度:来源:
(本小题满分14分)
设函数
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030143-68890.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030144-52901.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030144-88864.gif)
(1)求a、b的值;
(2)若对于任意的
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030144-43395.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030144-52211.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030144-14729.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030144-57720.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030145-33777.gif)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030145-78955.gif)
因为函数
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030145-46295.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030144-52901.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030144-88864.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030145-17985.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030145-48355.gif)
即
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030146-66520.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030144-14729.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030144-57720.gif)
(2)由(1)可知,
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030146-80792.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030146-93310.gif)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030146-43140.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030146-81942.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030147-28064.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030147-13993.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030147-63042.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030146-81942.gif)
所以,当
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030144-52901.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030145-46295.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030147-24659.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030148-59191.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030148-17793.gif)
则当
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030148-68296.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030145-46295.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030148-17793.gif)
因为对于任意的
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030148-68296.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030144-52211.gif)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030148-60252.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030148-18347.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030149-49495.gif)
因此
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030149-42195.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030145-33777.gif)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030132-25050.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030133-96541.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030133-82783.png)
A.![]() | B.![]() | C.![]() | D.![]() ![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030124-37579.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030125-27792.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030116-92716.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030116-12312.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030116-17127.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030117-45011.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030111-58332.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030112-57962.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030112-75902.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030112-66729.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030112-41171.gif)
下列4个命题:
①函数
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030112-78307.gif)
②函数
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030112-78307.gif)
③
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030112-78307.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030113-90787.gif)
④
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030112-78307.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030113-90787.gif)
其中正确的命题是 .
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030100-65217.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030100-66051.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030100-52805.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030100-80123.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030100-71856.png)
①求
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030100-12600.png)
②当
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030100-80583.png)
③若
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030100-12440.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030100-74474.png)
最新试题
- 1(1)用反证法证明:在一个三角形中,至少有一个内角大于或等于;(2)已知,试用分析法证明:.
- 2下列图像不能正确反映其对应操作的是[ ]A.在一定量的AgNO3溶液中逐滴加入NaCl溶液B.等质量的Zn和Mg
- 3口语交际(3分)导游小张带着旅游团在一个风景秀丽的景点登山。行至半山时,一位老太太的衣服被路边的荆棘划破了,她蹲在那儿再
- 4(6分)洋洋同学在探究“凸透镜成像规律及应用”的活动中,选用了焦距未知的凸透镜.(1)将凸透镜安装在光具座上,用平行光作
- 5有人这样比喻父母与子女间的冲突:“孩子是火种,父母是火药,火药是怎么堆起来的?是用爱堆的。父母越不断地付出,火药就不断堆
- 6下列文物出土于同一原始文化遗址,生活在该遗址的原始居民①已经使用磨制石器②种植粟、白菜和芥菜③烧制陶器④拥有成熟的文字钻
- 7食盐水能导电是因为存在下列可以自由移动的微粒( )A.H2OB.NaClC.Na和ClD.Na+和Cl-
- 8一列火车从静止开始做匀加速直线运动,一人站在第一节车厢前端的旁边观测,第一节车厢通过他历时2s,整列车厢通过他历时6s,
- 9有理数a,b,c在数轴上的位置如图所示,则|a+c|+|c﹣b|﹣|b+a|=[ ]A.﹣2bB.0C.2cD.2
- 10如图所示,O是波源,a、b、c、d是波传播方向上各质点的平衡位置,且Oa="ab=bc=cd=3" m,开始各质点均静止
热门考点
- 12010年世博会在上海开展,请你为山东展馆撰写一个宣传主题词,要能体现山东的文化特色,语言工整简洁,不超过20个字。(4
- 2如图所示,一质量为2kg的木板B静止在光滑的水平面上,其右端上表面紧靠一固定斜面轨道的底端(斜面底端与木块B右端的上表面
- 3在△ABC中,三条边长成等差数列且最小角的正弦值与最大角的正弦值之比为3:5,则△ABC是( )A.直角三角形B.等腰
- 4阅读下面的新闻,按要求答题。 据《新京报》报道:继手机、彩电之后,农民买洗衣机,也将享受政府补贴。国家财政将按照销售价
- 5除去下列物质中含有的杂质所选用试剂或操作方法不正确的一组是 物 质所含杂质除去杂质的试剂或方法A.CuSO4溶液硫酸加
- 6校学生会将举办义卖活动以资助贫困地区的儿童上学。请你写一份通知,内容包括:•介绍活动的目的;•号召大家踊跃捐献不用的物品
- 7【题文】下列函数中定义域为R,且是奇函数的是( )A.=x2
- 8下列性质不属于化学性质的是 ( )A.氧化性B
- 9蜂蜡是一种非晶体物质,它在熔化过程中要______(选填吸热或放热),温度______(选填升高、不变或降低).
- 10【题文】下列哪个函数的图像关于原点对称( )A.B.C.D.