设
.
(1)如果
在
处取得最小值
,求
的解析式;
(2)如果
,
的单调递减区间的长度是正整数,试求
和
的值.( 注:区间
的长度为
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37a6040b7af3d749da8cbd4ed5111ef0.png)
(1)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eca1ac021acc216e9fb38816c2ad6d9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a955ba5c572b82d3695c86833c82ce11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19b0a86d43e0a7f5f6719b2b7a153424.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
(2)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cce421674556f3479ffca372cbc93b33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45d4cd90a9671c1b4589a34d3538ff12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f65bb83b1daf4c79e6a10ec01a466425.png)
更新时间:2016-12-04 13:22:06
|
【知识点】 导数在函数中的其他应用
相似题推荐
解答题-问答题
|
较难
(0.4)
名校
【推荐1】已知
,设函数
,
.
(1)试讨论
的单调性;
(2)设函数
,是否存在实数
,使得
存在两个极值点
,
,且满足
?若存在,求
的取值范围;若不存在,请说明理由.
注:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/665a121aafc1241879f61974f8b6cee0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0f045ba713ff2a6cbcd037c54d9a42b.png)
(1)试讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78c204be088a8fc6c096eedd5b1e7dc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb7df298a9364b36e079a61caec815c.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/86b8b32f7c311a5275f185115f7c6e77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
注:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7c0309456de2cd6420ece4fbc5eeddb.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
名校
【推荐2】设函数
,其中
为自然对数的底数.
(1)当
时,讨论函数
在
上的单调性;
(2)当
时,求证:对任意
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0b6ffc19f1678f3cd5a1a2687f3e8f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e445f608e4a7d8535b100c0199a8ecf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/009935dae2483304749bfa46ceb6eecc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d01dc2d99655cf7598837cb0886166ed.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2143a6cfd3526c4f5795328baa51b0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/563ed1ebb56e33b5c387f3666be28fa9.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐3】设函数
.
(1)求曲线
在
处的切线方程;
(2)求函数
的单调区间;
(3)当
时,求
零点的个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9f691e73f6a1936e6a6bae10c563162.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9f8845aa2b51c460f2d798c9f62fa3.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7326ea56be82bd616fec7e6aa3c884c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
您最近一年使用:0次