【题文】已知函数(x)=,a是正常数。(1)若f(x)= (x)+lnx,且a=,求函数f(x)的单调递增区间;(2)若g(x)=
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【题文】已知函数
![](http://img.shitiku.com.cn/uploads/allimg/20200326/20200326062633-87995.png)
(x)=
![](http://img.shitiku.com.cn/uploads/allimg/20200326/20200326062634-82238.png)
,a是正常数。(1)若f(x)=
![](http://img.shitiku.com.cn/uploads/allimg/20200326/20200326062633-87995.png)
(x)+lnx,且a=
![](http://img.shitiku.com.cn/uploads/allimg/20200326/20200326062634-22716.png)
,求函数f(x)的单调递增区间;(2)若g(x)=
答案
举一反三
【题文】已知函数y=log
a(x
2+2x-3),当x=2时,y>0,则此函数单调递减区间是( )
A.(-∞,-1) | B.(-1,+∞) | C.(-∞,-3) | D.(1,+∞) |
【题文】 已知函数
![](http://img.shitiku.com.cn/uploads/allimg/20200326/20200326062532-42501.png)
,
![](http://img.shitiku.com.cn/uploads/allimg/20200326/20200326062533-65101.png)
,且
![](http://img.shitiku.com.cn/uploads/allimg/20200326/20200326062533-51069.png)
,当
![](http://img.shitiku.com.cn/uploads/allimg/20200326/20200326062534-69941.png)
时,
![](http://img.shitiku.com.cn/uploads/allimg/20200326/20200326062532-42501.png)
是增函数,
设
![](http://img.shitiku.com.cn/uploads/allimg/20200326/20200326062534-49898.png)
,
![](http://img.shitiku.com.cn/uploads/allimg/20200326/20200326062534-50819.png)
,
![](http://img.shitiku.com.cn/uploads/allimg/20200326/20200326062535-54822.png)
,则
![](http://img.shitiku.com.cn/uploads/allimg/20200326/20200326062535-72664.png)
、
![](http://img.shitiku.com.cn/uploads/allimg/20200326/20200326062536-47031.png)
的大小顺序是
【题文】 已知
![](http://img.shitiku.com.cn/uploads/allimg/20200326/20200326062520-14821.png)
,那么
![](http://img.shitiku.com.cn/uploads/allimg/20200326/20200326062520-28626.png)
的取值范围( )
A.(0,1) B,
![](http://img.shitiku.com.cn/uploads/allimg/20200326/20200326062521-67234.png)
C.
![](http://img.shitiku.com.cn/uploads/allimg/20200326/20200326062521-15832.png)
D.
![](http://img.shitiku.com.cn/uploads/allimg/20200326/20200326062521-17179.png)
【题文】.函数
![](http://img.shitiku.com.cn/uploads/allimg/20200326/20200326062456-43531.png)
的单调增区间是______________.
【题文】已知定义在R上的奇函数
![](http://img.shitiku.com.cn/uploads/allimg/20200326/20200326062431-78485.png)
,满足
![](http://img.shitiku.com.cn/uploads/allimg/20200326/20200326062432-31859.png)
,且在区间[0,2]上是增函数,则( ).
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