题目
题型:解答题难度:简单来源:不详
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062923-65226.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062923-19506.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062923-37237.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062923-77245.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062923-65226.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062923-25260.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062924-96141.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062924-20918.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062923-65226.png)
(2)试求函数
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062923-65226.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062924-80871.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062924-80926.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062924-85363.png)
即
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062924-48785.png)
解得
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062925-67523.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062925-54338.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062925-69164.png)
∴函数的最大值求值问题可分成三种情况:
(1)当
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062925-33063.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062925-25944.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062926-67628.png)
(2)当
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062926-39453.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062926-45908.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062925-25944.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062926-99127.png)
(3)当
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062926-14574.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062927-25789.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062927-39683.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062925-25944.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062923-65226.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062927-74213.png)
故
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062927-94824.png)
解析
核心考点
试题【对于函数,若存在,使得成立,则称为的天宫一号点.已知函数的两个天宫一号点分别是和2 .(1)求的值及的表达式; (2)试求函数在区间上的最大值.】;主要考察你对一次函数的图象和性质等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062921-46049.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062922-32769.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062915-30059.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062915-98734.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062916-38954.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062916-47241.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062916-74576.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062916-85873.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062916-78460.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062917-10072.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062917-74695.png)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062917-48241.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062917-98972.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062917-76973.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062918-14195.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062918-12116.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062912-98507.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062910-59981.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062911-22230.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062909-13995.png)
A.当x∈(1,+∞)时,函数单调递增 |
B.当x∈(1,+∞)时,函数单调递减 |
C.当x∈(-∞,-1)时,函数单调递增 |
D.当x∈(-∞,3)时,函数单调递减 |
最新试题
- 1阅读理解。 Here is some advice to help you develop confidence(
- 2下列划线字注音完全正确的一项是( )。 (2分) A 哽咽(yè) 蝉蜕(tuì) 可汗(hán)
- 3图中A、B两个均匀圆柱体是由同种材料制成的,若按图所示把它们依次放在一块海棉上,那可以探究压力的作用效果与( )A.受
- 4用括号内所给动词的适当形式填空。1. Betty is often seen ______ (help) the old
- 5PM2.5是指大气中直径小于或等于2.5微米的颗粒物,也称为可入肺颗粒物,对人体健康和大气环境质量的影响更大. 2012
- 6读城市天气预报图回答:(1)晴转多云的城市是________。(2)晴转阵雨的城市是________。 (3)多云转晴的
- 7下列各句中加线的词都有活用现象,活用方式归类正确的一项是( )(3分)①可烧而走也 ②乃遂收盛樊於期之首,函封
- 8一件工程甲单独做15天可以完成,乙单独做12天可以完成,甲,乙,丙三人合作4天可以完成,那么丙单独做,( )天可以
- 9Mr. Brown found her daughter _____ because she lost her toy
- 10将一元二次方程x2-2x-2=0配方后所得的方程是( )A.(x-2)2=2B.(x-1)2=2C.(x-1)2=3D
热门考点
- 1二、Complete each sentence according to the Chinese given.1. E
- 2绝对值大于1而小于3.5的整数有______个.
- 3一辆汽车开往距离出发地180千米的目的地,出发后第一小时内按原计划的速度匀速行驶,一小时后以原来速度的1.5倍匀速行驶,
- 4Li Hong and I _________ in No. 2 High School. [ ]A. am B
- 5在动物的栖息环境中,对动物加以保护的方式属于: [ ]A.就地保护 B.易地保护 C.就地保护和易地保护相结
- 6下列同学最容易获得友情的是[ ]A.性格孤僻,不善言辞的小红 B.性格开朗,乐于助人的小芳 C.学习成绩好,但不
- 7下列说法正确的是( )A.视力正常的人用镜子照自己的脸时,镜子应离眼睛25cmB.患近视眼应配带度数适当的凸透镜C.把
- 8阅读下面语段,按要求回答问题:春天到来,生活在首都北京的人们,总想出去( )一下明媚的春光。A.观赏B.观看C.观望
- 9阅读理解。 Sometimes, people are not clear about what kind o
- 10下列计算正确的是( )A.16=±4B.32-22=1C.24÷6=4D.23.6=2