题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070744-14926.gif)
(1)若函数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070744-30533.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070745-30632.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070745-59898.gif)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070745-94943.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070744-30533.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070745-80031.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070745-75385.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070746-98639.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070745-59898.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070746-71439.gif)
(2)(Ⅰ)单调递增区间是
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070746-49919.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070746-19517.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070747-93648.gif)
(Ⅱ)证明见解析
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070747-24247.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070747-28884.gif)
(1)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070747-73828.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070744-30533.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070745-30632.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070747-32514.gif)
则
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070748-63421.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070748-31231.gif)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070745-59898.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070746-71439.gif)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070748-95956.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070748-54927.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070749-34785.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070749-62403.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070749-69578.gif)
(Ⅰ)由
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070749-94645.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070749-64558.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070750-56968.gif)
由
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070750-49124.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070750-58579.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070750-52446.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070746-49919.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070746-19517.gif)
单调减区间为
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070747-93648.gif)
(Ⅱ)易知
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070744-30533.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070751-16028.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070744-30533.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070751-89782.gif)
又
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070751-57372.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070750-52446.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070751-36561.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070751-20415.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070752-17271.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070752-31505.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070752-90447.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070752-82656.gif)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070733-13326.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070734-95309.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070734-14550.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070734-13101.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070734-85051.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070727-21767.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070727-40926.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070728-12091.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070722-39009.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070722-34537.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070714-93473.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070714-94043.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070714-96081.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070714-18483.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070704-18410.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070704-26490.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018070704-59449.gif)
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