已知函数
.
(1)讨论函数
的单调区间;
(2)若
,
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e465d75e30510d7f3f343a1eaeead24.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1ccb692a97ea01b9847bb3401f8a6e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f79d98acfc3c360265ef06f9e0c81ede.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2017-05-03 08:14:23
|
相似题推荐
解答题-证明题
|
较难
(0.4)
名校
【推荐1】已知函数
.
(1)求证:
至多只有一个零点;
(2)当
时,
分别为
的极大值点和极小值点,若
成立,求实数k的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fad43211ce1130a38a7b604b5db61b88.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7326ea56be82bd616fec7e6aa3c884c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f386803debe019dfca91cb18a09c1b1.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
解题方法
【推荐2】已知函数
.
(1)
是
的导函数,求
的最小值;
(2)已知
,证明:
;
(3)若
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b97f8f222f9665ea94b6113c2a194c9b.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/930bc56406e69b785b37a83d48e36724.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c0ef5a0f806510d2d74492a44dbc721.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adab2cb8ac15e02a8a06ae42fe800b62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
【推荐3】已知函数
.
(1)当
时,求函数
在点
处的切线方程;
(2)若函数
在
处取得极值,求实数
的值;
(3)若不等式
对
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65ebae6b9838d179f6980723fb66b78f.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5828873f8369183faf71181cda5b61d2.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d0c99ddd028f0bc3b1d64924ff0f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6acb0f1ac694dd177e99fc385f23318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bce2594833690eedb3328fe747feb3a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】设函数
(
)(
是一个无理数)
(1)若函数
在定义域上不是单调函数,求a的取值范围;
(2)设函数
的两个极值点为
和
,记过点
、
的直线
的斜率为k,是否存在a, 使得
?若存在,求出a的取值集合;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22cd277fe63fe62cc55060fac0c6178.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d218992d1942266d7208e476d0c4100.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f6470c6a4349ea591ce2bbcd93199f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ee844c70ab064971860fb0a2b00acb3.png)
的斜率为k,是否存在a, 使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41b3445bbdb48fc0efd0a029bdce6f58.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
解题方法
【推荐2】已知函数
.
(1)若
,判断
在
上的单调性,并用单调性的定义证明;
(2)设函数
,若对任意
,总有
,使得
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51f44e619b41991f2002cc203be8d6f3.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa4c355f11471a38f5583a434a1ddeb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/189b2da6c420bf8f8900002d14f65f72.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ed2773b25d35138dad01fadf8632f15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3d5a5e70f64f0933ae1e4ddec5fa2c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f92a39100a738af90edc8da0fc3c5b63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/347ac85769012f89d1f9951684e1d7b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次