解题方法
1 . 已知函数
,其中
.
是自然对数的底数.
(1)若曲线
在
处的切线方程为
.求实数
的值;
(2)① 若
时,函数
既有极大值,又有极小值,求实数
的取值范围;
② 若
,
.若
对一切正实数
恒成立,求实数
的最大值(用
表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd36b541e26d9c41ffd41564da2b7805.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73254f32b6da29ecc32df2e9f87a4c97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11204e2fb6e560bf7a4ca26eaebfc526.png)
(1)若曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f77358bc6266da464c4900f13fa16d03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
(2)① 若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f22a4a0dd7307a1323d25331e60782d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
② 若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/182456ca1ba2add25922c89e37e0fb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b8806cf7a8fc63b64625ab53b3cf36b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
您最近一年使用:0次
2016-12-04更新
|
973次组卷
|
4卷引用:2017届江苏泰州中学高三上第一次月考理数试卷
2012·江苏泰州·一模
解题方法
2 . 已知函数.
(Ⅰ)若函数在区间
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51671cf7c5ffb3f56318a537e4554565.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
(Ⅱ)如果当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2fb40a36a293471742ce75f6b9635b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf0aab66798e1f60dc23c693c14e5a0.png)
(Ⅲ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8aded04121ea266748f3f5fff5bd5db.png)
您最近一年使用:0次