题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020021-40902.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020021-49997.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020022-95102.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020022-21794.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020022-31453.png)
(1)确定
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020022-17201.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020022-33659.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020023-97770.png)
(3)若
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020023-97770.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020023-33432.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020023-38315.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020023-57063.png)
解析
试题分析:(1)由
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020021-40902.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020024-82060.png)
因为
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020024-58158.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020024-25247.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020022-95102.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020022-21794.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020022-31453.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020024-73425.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020024-33915.png)
(2)由(1),
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020025-81430.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020025-77291.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020024-58158.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020023-97770.png)
(3)要使函数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020023-97770.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020024-58158.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020025-69641.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020025-22135.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020025-22135.png)
解:(1)对
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020025-48452.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020026-59849.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020024-58158.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020024-25247.png)
即
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020026-25213.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020026-38545.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020026-12291.png)
又
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020027-77905.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020023-38315.png)
(2)当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020025-77291.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020027-13660.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020027-81208.png)
故
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020023-97770.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020027-11061.png)
(3)由(1)知
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020027-93045.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020028-13466.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020028-41964.png)
下面分三种情况进行讨论.
当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020028-43042.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020028-98569.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020025-48452.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020029-53758.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020029-64496.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020029-15770.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020025-48452.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020029-77418.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020029-62267.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020030-39203.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020030-15733.png)
即
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020030-19331.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020030-21263.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020031-63892.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020031-34578.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020031-84688.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020031-87808.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020031-16008.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020025-48452.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020032-61980.png)
综上,若
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020025-48452.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020025-22135.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020023-57063.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020002-44905.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020002-45924.png)
(2)记
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020002-16376.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020002-45924.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020002-20626.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020003-76533.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018020003-30038.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018015938-44512.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018015938-16922.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018015938-71980.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018015938-73484.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018015938-68390.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018015938-19037.png)
(2)证明:当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018015938-79390.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018015938-16922.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018015939-38588.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018015920-17728.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018015920-24281.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018015916-13078.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018015917-90092.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018015917-52442.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018015917-90092.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018015859-64039.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018015859-91178.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018015859-87396.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018015859-68661.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018015859-79792.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018015859-23801.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018015859-80506.png)
(3)设
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018015859-15377.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018015900-50502.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018015900-77199.png)
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