题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023655-28251.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023656-59932.png)
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023656-50132.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023656-23190.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023656-76430.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023656-62579.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023656-99781.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023656-38596.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023656-90161.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023657-28893.png)
解析
试题分析:(1)函数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023655-28251.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023656-59932.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023656-50132.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023657-37768.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023656-90161.png)
(2)由
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023656-62579.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023656-99781.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023657-99906.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023656-90161.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023656-38596.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023657-77989.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023657-37127.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023656-90161.png)
试题解析:(1)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023656-50132.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023657-37768.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023657-81340.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023657-70142.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023657-44525.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023656-23190.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023656-76430.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023657-71797.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023657-42491.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023656-23190.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023656-76430.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023658-69018.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023658-35561.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023658-45590.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023658-66376.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023658-65620.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023657-42491.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023656-23190.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023658-26054.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023658-59207.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023657-44525.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023656-23190.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023658-94873.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023656-62579.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023659-29253.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023656-38596.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023659-27120.png)
记
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023657-77989.png)
则
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023659-92582.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023659-14111.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023659-45372.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023659-52514.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023659-54243.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023659-58562.png)
所以当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023656-99781.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023659-28944.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023656-38596.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023700-16823.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023700-58344.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023700-57540.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023700-96985.png)
存在
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023701-77238.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023701-85309.png)
此时
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023701-96891.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023701-55227.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023701-22436.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023702-78231.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023702-25370.png)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023702-56962.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023702-50028.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023703-57862.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023703-25980.png)
综上,实数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023656-90161.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023657-28893.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023647-37170.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023647-81392.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023648-47079.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023636-10870.png)
(1)试判断函数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023636-19021.png)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023636-55676.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023636-19021.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023636-83211.png)
(3)试证明:对任意
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023636-81140.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023637-37927.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023637-66735.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023617-33651.png)
(1)若方程
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023617-26608.png)
(2)如果函数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023617-37891.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023617-60737.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023618-95240.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023618-28892.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023618-65766.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023618-20456.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023605-24460.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023605-49850.png)
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023605-18963.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023606-79633.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023606-57827.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023605-18963.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023605-18963.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023606-60647.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023606-25799.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023550-15888.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023550-32091.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023550-14098.png)
(1)求实数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023550-18752.png)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023551-35934.png)
①若
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023551-10084.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023551-54616.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023551-85548.png)
②是否存在点
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023552-54112.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023552-54112.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023552-10403.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018023552-54112.png)
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