题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204180110-55843.png)
(Ⅰ) 若直线y=kx+1与f (x)的反函数的图像相切, 求实数k的值;
(Ⅱ) 设x>0, 讨论曲线y=f (x) 与曲线
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204180111-20802.png)
(Ⅲ) 设a<b, 比较
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204180111-65907.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204180111-61705.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204180111-10486.png)
(Ⅱ)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204180112-23307.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204180112-86891.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204180112-74222.png)
(Ⅲ)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204180113-68047.png)
(Ⅰ). 函数
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204180113-44541.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204180113-12398.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204180113-95878.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204180113-44541.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204180114-44465.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204180114-88223.png)
(Ⅱ)令
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204180114-55471.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204180115-63927.png)
有
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204180115-28265.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204180115-44357.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204180115-45279.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204180112-86891.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204180112-74222.png)
(Ⅲ)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204180116-68062.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204180116-16842.png)
本题考查函数、导数、不等式、参数等问题,属于难题.第二问运用数形结合思想解决问题,能够比较清晰的分类,做到不吃不漏.最后一问,考查函数的凹凸性,富有明显的几何意义,为考生探索结论提供了明确的方向,对代数手段的解决起到导航作用.
【考点定位】本题考查考查函数的凹凸性、导数、不等式、参数等问题.属于难题.
核心考点
试题【已知函数. (Ⅰ) 若直线y=kx+1与f (x)的反函数的图像相切, 求实数k的值; (Ⅱ) 设x>0, 讨论曲线y=f (x) 与曲线 公共点的个数.】;主要考察你对函数的相关概念等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204180039-48138.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204180039-74216.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
(1)若a1=0,求a2,a3,a4;
(2)若a1>0,且a1,a2,a3成等比数列,求a1的值
(3)是否存在a1,使得a1,a2,…,an,…成等差数列?若存在,求出所有这样的a1,若不存在,说明理由.
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175945-77720.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175946-47085.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175946-22544.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175946-66305.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175946-47085.png)
①
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175947-28512.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175947-78882.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175947-42306.png)
则存在“等值区间”的函数的个数是___________.
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175920-56398.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175920-77628.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175920-90664.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175921-79431.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175921-30922.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175921-57151.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175923-88445.png)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175923-38473.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175923-11519.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175924-68590.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175924-16607.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175924-49677.png)
(3)对任意正整数
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175925-21299.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175925-57401.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175925-61926.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175757-88600.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175757-65258.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175757-65805.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175757-77059.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175757-85327.png)
当a=2,m=0时,直线
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175757-77059.png)
当a=3,m=
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175758-29049.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175757-77059.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175758-44894.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175757-77059.png)
A. ①② B. ①③ C. ②③ D. ①②③
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