已知函数
,且
.
(1)当
时,求函数
的最大值;
(2)判断函数
零点的个数,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/149ccc4352b6d8986120f79fff573098.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
22-23高三上·湖南常德·期中 查看更多[2]
更新时间:2022-12-11 20:06:58
|
相似题推荐
解答题-问答题
|
困难
(0.15)
解题方法
【推荐1】设函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3e53be76f058e33caa915ff6c92e851.png)
,其中
,
为正整数,
,
,
均为常数,曲线
在
处的切线方程为
.
(1)求
,
,
的值;
(2)求函数
的最大值;
(3)证明:对任意的
都有
.(
为自然对数的底)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3e53be76f058e33caa915ff6c92e851.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab03556c333ab0b55fe86c937b2a5763.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd9cdea1e995c59e5d3225acad8b4d3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5828873f8369183faf71181cda5b61d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0985b973395bcd371cd1e26d3fcd1c36.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)证明:对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66692ec49a458f9e48c7315d03dfc37b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e713650d796d20e89a8d6f18c01c303.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.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2】已知函数
.
(1)当
时,求函数
在
上的最大值.
(2)若函数
在定义域内有两个不相等的零点
,
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9738b5efda434f795949c1f95f824e53.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/200f24e682c93e02a87f3f9d57dc5d40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9210e75c35fb455d0446eb7ddba7d79c.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.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/b45da1d6c4fd59798ff6191eae2bc251.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
【推荐1】已知函数
.
(1)当
时,求函数
的最小值;
(2)若函数
在区间
内存在零点,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29e4b4fdd2617f4ad97ec77edccc7c5f.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d655ee6d4c2285b6f59652360862d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
【推荐2】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3df2cf24698766c54e7a7c61d4ad2bfb.png)
(1)当
时,求函数
的单调区间;
(2)若方程
在区间
上有实数解,求实数a的取值范围;
(3)若存在实数
,且
,使得
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3df2cf24698766c54e7a7c61d4ad2bfb.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ac0a38f359dd17a73c3e9f7bbbc5be2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/870ebc2f7aabb028024894568d749934.png)
(3)若存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53e15f0b1bdff81fe56227d1141f8bc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87027136ff548fc504dea240e75cea86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bc9edb22a22dd339bf9f169e6642169.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fe357c4d3077bdf6f6f88921a234bc1.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)当
时,过点
与函数
相切的直线有几条?
(2)若
有两个交点,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e9650c58729a946e6c45d05846a7019.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7a999c36de5c9a9ce876a4a56fa34c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f505213f12566533875ea978778fea0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次