题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040307-54924.png)
(Ⅰ)当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040307-56124.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040307-86792.png)
(Ⅱ)设
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040307-30797.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040308-42390.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040308-75034.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040308-94939.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040308-84168.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040309-87010.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040309-54372.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040309-54372.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040309-45970.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040309-51898.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040309-21425.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040310-78984.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040307-86792.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040309-45970.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040309-21425.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040310-10207.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040307-86792.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040310-77264.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040310-65577.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040311-31603.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040307-86792.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040309-45970.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040311-55803.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040307-86792.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040311-38539.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040311-77200.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040307-86792.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040311-61124.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040309-87010.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040312-11059.png)
解析
试题分析:(I) 当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040307-56124.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040307-86792.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040312-31951.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040312-82742.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040312-26038.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040313-89497.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040313-96115.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040309-54372.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040310-10207.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040310-65577.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040307-30797.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040308-42390.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040308-75034.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040308-94939.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040308-84168.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040309-87010.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040308-42390.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040308-75034.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040307-86792.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040308-94939.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040313-94174.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040308-42390.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040307-86792.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040309-45970.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040313-67378.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040313-11663.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040313-94174.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040309-87010.png)
试题解析:(I)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040314-49099.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040314-23502.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040314-88456.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040314-69896.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040309-54372.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040309-45970.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040309-51898.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040309-21425.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040310-78984.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040307-86792.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040309-45970.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040309-21425.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040315-55893.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040310-10207.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040315-63491.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040307-86792.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040310-77264.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040315-64836.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040310-65577.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040315-40061.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040311-31603.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040309-51898.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040307-86792.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040309-45970.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040311-55803.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040310-78984.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040307-86792.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040311-38539.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040311-77200.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040309-51898.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040307-86792.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040311-61124.png)
(II)若对任意
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040308-75034.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040308-94939.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040308-84168.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040316-50501.png)
由(I)知,当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040308-42390.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040307-86792.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040309-45970.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040313-67378.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040313-11663.png)
法一:
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040307-30797.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040316-19208.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040314-69896.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040316-76032.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040316-92399.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040316-30634.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040317-55017.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040315-55893.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040317-92607.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040317-97898.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040317-20594.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040317-97898.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040315-64836.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040317-24210.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040318-53701.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040318-49134.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040318-53701.png)
综上:
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040312-11059.png)
法二:
参变量分离:
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040318-91410.png)
令
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040318-14825.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040318-50194.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040319-23362.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040319-87568.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040319-66233.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040312-11059.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040256-24399.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040256-29358.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040251-89029.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040251-90296.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040252-75381.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040244-56513.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040244-57241.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040244-37088.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040244-94272.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040244-95556.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040245-92081.png)
(3)若对
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040245-99608.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040245-44380.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040245-53108.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040236-59902.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040236-45082.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040229-29729.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040229-10966.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040229-51415.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018040230-78319.png)
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