题目
题型:解答题难度:简单来源:不详
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193605-93913.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193605-17942.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193605-71141.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193605-30612.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193606-24347.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193606-90235.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193605-30612.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193606-32739.png)
(Ⅰ)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193605-30612.png)
(Ⅱ)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193605-30612.png)
(Ⅲ)若
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193606-25675.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193607-52725.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193607-22497.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193607-16746.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193609-35862.png)
(Ⅲ)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193609-49167.png)
解析
试题分析:(Ⅰ)由题意,
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193609-34149.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193610-30077.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193610-28951.png)
由
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193610-49125.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193610-85619.png)
又
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193610-88907.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193611-19063.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193611-89855.png)
(Ⅱ)由
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193611-60669.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193611-15832.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193612-36867.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193612-52584.png)
(Ⅲ)由题意知,方程
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193612-10241.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193612-99298.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193612-98627.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193613-70331.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193605-93913.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193605-93913.png)
点评:求函数
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193605-93913.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193613-85374.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193613-50988.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193613-50988.png)
核心考点
试题【(12分)已知函数,在同一周期内,当时,取得最大值;当时,取得最小值.(Ⅰ)求函数的解析式;(Ⅱ)求函数的单调递减区间;(Ⅲ)若时,函数有两个零点,求实数的取值】;主要考察你对指数函数图象及性质等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193601-23751.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193601-23751.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193602-91184.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193601-23751.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193602-56580.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193602-74832.png)
A.![]() | B.![]() | C.![]() | D.![]() |
①函数
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193557-42325.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193557-42078.png)
②奇函数的图象一定通过直角坐标系的原点;
③函数
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193558-81446.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193558-38183.png)
④若函数
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193558-17701.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193558-22366.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193558-69350.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193559-62422.png)
⑤设函数
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193559-20037.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193559-82334.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193559-69311.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193559-36949.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193559-82334.png)
其中正确命题的序号是 .(填上所有正确命题的序号)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193552-36867.png)
A.(0,1) | B.(1,2) | C.(2,3) | D.(3,4) |
① 若
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193550-31711.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193550-47977.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193550-28681.png)
②
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193550-86542.png)
③ 函数
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193550-71375.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193550-55063.png)
④ 已知
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193550-16495.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193550-86990.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193550-99324.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193550-50767.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819193550-16495.png)
其中正确说法的序号是( )
A.①②④ | B.①③④ |
C.②③④ | D.①②③ |
A.![]() | B.![]() |
C.![]() | D.![]() |
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