已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fcb6dd6d853d9cb322bfcd99033df57.png)
(1)设函数
,若
在其定义域内恒成立,求实数a的最小值;
(2)若方程
恰有两个相异的实根
,试求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fcb6dd6d853d9cb322bfcd99033df57.png)
(1)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef312da5ce9ea8e3139ac6614d9897f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fa38ca27c6c0c40d5e36b2ae4fb7ba7.png)
(2)若方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e74eaf6a919fc736fcd23d12872bae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
更新时间:2022-11-05 18:28:19
|
相似题推荐
解答题-问答题
|
困难
(0.15)
解题方法
【推荐1】已知函数
.
(1)求函数
的极值;
(2)若
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19276067b7f4617f8506524bf4f5c500.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87411cb9acff4b7a259f43c65fe34fa0.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
|
困难
(0.15)
名校
解题方法
【推荐2】已知
是自然对数的底数,函数
,直线
为曲线
的切线,
.
(1)求
的值;
(2)①判断
的零点个数;
②定义
函数
在
上单调递增.求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a12c6f53093c3266b2fecb610e0bc219.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16a27c31d57a84a5928898de139cb40a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccfc6adb92436ae6ec9972212e567009.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)①判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4633de9335d15d7685bdecb007a3678c.png)
②定义
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2613ead5ec8aeec852c5f3263f8e117b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/757d80f12e86e621fabc7878192d9fb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
解题方法
【推荐3】函数
,
.
(1)讨论
的极值的个数;
(2)若
在
上恒成立,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae28289edffa8cf31addfbe53ec19612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8949760993f4ea9f1362266269282b7a.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11189f5ca49aad543dfda75290cc8c0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4921923069c4f38a0af1ff8637e35b3c.png)
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
【推荐1】已知函数
,其中
.
(1)当
时,求证:
在
上单调递减;
(2)若
有两个不相等的实数根
.
(ⅰ)求实数
的取值范围;
(ⅱ)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f37a175d8cf18088968887405368fba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dd8b3dc4c609bab82d356a5cc2208d.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f00a9728f28395dd763aba3104a1079.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
(ⅰ)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(ⅱ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0fd6297d9af0dbfaccd08a53054ec5.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
【推荐2】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cf557d4cc1955a70e1ac71ebbc1093e.png)
.
(1)讨论函数
的单调区间;
(2)若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e3a1467ecf286e3cadaf5aa006606f2.png)
是曲线
上的两点,
.问: 是否存在
,使得直线
的斜率等于
?若存在,求出
的值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cf557d4cc1955a70e1ac71ebbc1093e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3911a0f23c479a6a89cbcc5c3d3fd2d.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e3a1467ecf286e3cadaf5aa006606f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/249a65b562bca8e9db36e39021fc663a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c45b5bbd5fb7706c6f7c24df34fc145.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91421e7703d87617f50270178decd18a.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
|
困难
(0.15)
【推荐3】已知函数
.
(1)讨论函数
的单调性;
(2)已知
且关于x的方程
只有一个实数解,求t的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd622e37fcd5b74cb160173d69c653e1.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fff6e7e2b9f2b68b1647f6350b98dc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca0768fdda38d69ccc506998ea6f9485.png)
您最近一年使用:0次