题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091644-89843.png)
(1)试判断函数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091644-13269.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091644-73692.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091645-27601.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091645-33355.png)
解析
试题分析:(1)要判断单调性,我们可以利用单调性定义或者用导数的知识,本题中我们求出函数的导数为
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091645-36630.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091645-52503.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091646-29798.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091646-56337.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091646-35940.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091647-14415.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091644-13269.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091647-89102.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091644-73692.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091647-29623.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091647-38895.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091645-27601.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091648-52850.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091648-15790.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091648-75750.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091648-34976.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091647-89102.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091649-75461.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091649-28084.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091647-89102.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091649-48524.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091645-33355.png)
(1)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091649-32078.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091649-43276.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091650-21638.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091650-75279.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091644-13269.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091650-40199.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091650-44635.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091651-82673.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091651-47691.png)
再令
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091651-98105.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091651-30146.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091651-37535.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091650-40199.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091652-11374.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091652-93838.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091652-55137.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091650-40199.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091652-34730.png)
核心考点
举一反三
(Ⅰ)若a=1,求曲线y=f(x)在点(2,f(2))处的切线方程;
(Ⅱ)若|a|>1,求f(x)在闭区间[0,|2a|]上的最小值.
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091626-48397.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091626-25010.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091626-29816.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091619-52201.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091619-79031.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091620-10714.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091620-45664.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091613-67198.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091613-28249.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091613-80699.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091614-60583.png)
A.(2,0) ∪(2,+∞) | B.(2,0) ∪(0,2) |
C.(∞,2)∪(2,+∞) | D.(∞,2)∪(0,2) |
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091604-49463.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091604-60335.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018091604-11453.png)
A.![]() |
B.![]() |
C.![]() |
D.![]() |
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