11-12高一上·江苏南通·期中
1 . 已知函数
,其中a∈R.
(1)当a=2时,把函数f(x)写成分段函数的形式;
(2)当a=2时,求f(x)在区间[1,3]上的最值;
(3)设a≠0,函数f(x)在(m,n)上既有最大值又有最小值,请分别求出m、n的取值范围(用a表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7509401d2928942bb8bbe2a83477da09.png)
(1)当a=2时,把函数f(x)写成分段函数的形式;
(2)当a=2时,求f(x)在区间[1,3]上的最值;
(3)设a≠0,函数f(x)在(m,n)上既有最大值又有最小值,请分别求出m、n的取值范围(用a表示).
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11-12高一上·北京·期中
2 . 设
,若
,
.
(1)求证:方程
在区间
内有两个不等的实数根;
(2)若
都为正整数,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29073ef5c8d9f4912d86a7b61e2f3b06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c766352f0be38b719621052de92615bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee026ae04e36455b238c42e42b87e201.png)
(1)求证:方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3047d4ab078dafc06c047bcbf0a6ffaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cae5195b3d36f67270d83202c83b19b3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ae24688d4c45aad43e9af0b7bbfda6b.png)
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11-12高一上·黑龙江·期中
解题方法
3 . 已知函数
,
.
(1)当
时,求满足
的实数
的范围;
(2)若
对任意的
恒成立,求实数
的范围;
(3)若存在
使
对任意的
恒成立,其中
为大于1的正整数,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf8ab27399ed19b5da5ec01b28a0a69d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcd9218a657b17654c5d757a6f7dee9a.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f8e10f5bfc5aa2b49a64ab51986afae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041cd2291ceed0733b7a1baa3e3d740e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7c48591fc33993b112f1cd8b8de4b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)若存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00684b35b6c8acffea07545ee649947c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2011·广东广州·一模
名校
4 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/331d5e308cd5469e0f28a8d75f79903f.png)
满足
,对于任意
R都有
,且
,令
.
(1)求函数
的表达式;
(2)求函数
的单调区间;
(3)研究函数
在区间
上的零点个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/331d5e308cd5469e0f28a8d75f79903f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f5bb89c3ad435f1ef59307b174105ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01bea8bf593f594c51fc7cc547482bee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e44c45ef0334070fc149b452dee26ae5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8559250e7a91f36fe7a8ec6ce6a1550f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c89c7f9879e66fcefc43ce384ff3615.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6cd058ecddd80deb7cc3f060cd0f064.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
(3)研究函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7160d93f92089ef36f3dab809d3114b8.png)
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