题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124203-78474.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124203-15717.png)
(1)当
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124203-28949.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124203-11339.png)
(2)当
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124204-76535.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124203-11339.png)
(3)设
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124204-34991.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124203-11339.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124204-56741.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124204-25978.png)
解析
试题分析:(1)对于含绝对值的函数一般可通过讨论去掉绝对值化为分段函数再解答,本题当
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124203-28949.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124203-11339.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124205-79025.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124205-51135.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124205-61440.png)
试题解析:(1)当
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124203-28949.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124205-88037.png)
由图象可知,
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124206-64411.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124204-56741.png)
(2)因为
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124205-79025.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124206-45454.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124206-46613.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124206-35635.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124207-75189.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124207-50234.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124207-43082.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124207-96317.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124208-71205.png)
(3)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124208-41828.png)
①当
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124208-31671.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124208-14561.png)
图1
由
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124208-93761.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124209-90601.png)
②当
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124209-97969.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124209-92778.png)
图2
由
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124209-33355.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124210-68832.png)
核心考点
试题【已知,函数.(1)当时,写出函数的单调递增区间;(2)当时,求函数在区间[1,2]上的最小值;(3)设,函数在(m,n)上既有最大值又有最小值,请分别求出m,n】;主要考察你对导数的意义等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124146-11163.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124147-76375.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124147-14958.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124147-65387.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124148-26320.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124148-42317.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124134-11371.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124135-21735.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124135-62897.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124135-21498.png)
(1)求a和b的值; (2)证明:
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124136-95028.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124118-56143.png)
(Ⅰ)当
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124118-96643.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124118-48436.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124118-39639.png)
(Ⅱ)求
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124119-87061.png)
(Ⅲ)若函数
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124119-87061.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124119-43198.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124106-51896.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124106-12294.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124106-51896.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124106-52804.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124107-53457.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124107-77907.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124107-96898.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124106-12294.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124107-72498.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124107-53457.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124107-79099.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124108-35961.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124108-96981.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124108-78039.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124108-96295.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124109-64817.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124109-64817.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124109-70409.png)
A
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124109-98559.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124110-25615.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124054-92073.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124054-43632.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124054-40802.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124054-92831.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124055-54645.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124054-40802.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124055-97317.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124055-76169.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124055-46855.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124056-56856.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124056-22837.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124056-22837.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124056-29953.png)
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