已知函数
(
且
).
(1)若
,求函数
的极值;
(2)若存在
,使得
成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1da9ecd898c6fb2b26d50482c87af8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c6ef92ec5f332fb68c03bc38bddf412.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92755ed40510a358dcb77392749fd792.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
20-21高三·云南昆明·阶段练习 查看更多[4]
云南省昆明市第一中学2021届高三第六次复习检测(2月月考)数学(理)试题(已下线)专题1.15 导数-存在性问题-2021年高考数学解答题挑战满分专项训练(新高考地区专用)福建省连城县第一中学2020-2021学年高二下学期第一次月考数学试题山西省太原市第五中学校2021届高三下学期3月模块诊断数学(文)试题
更新时间:2021-03-03 11:16:41
|
相似题推荐
解答题-证明题
|
适中
(0.65)
名校
【推荐1】已知f(x)=ax-ln x,x∈(0,e],g(x)=
,x∈(0,e],其中e是自然常数,
.
(1)讨论a=1时,函数f(x)的单调性和极值;
(2)求证:在(1)的条件下,f(x)>g(x)+
;
(3)是否存在正实数a,使
的最小值是3?若存在,求出a的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3d166d6513f87711ca7971d59324826.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
(1)讨论a=1时,函数f(x)的单调性和极值;
(2)求证:在(1)的条件下,f(x)>g(x)+
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(3)是否存在正实数a,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】已知函数
,
.
(1)当
时,求函数
的单调区间;
(2)设函数
,其中
是自然对数的底数,判断
有无极值,有极值时求出极值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a4e2805748eba35aef6b74a3803afc1.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)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc72509f016f4af7b5982af6b80ea2bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d218992d1942266d7208e476d0c4100.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
解题方法
【推荐3】已知函数
,
.
(1)设函数
,若
,求
的极值;
(2)设函数
,若
的图象与
的图象有
,
两个不同的交点,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61d08ac7999649dfe4701c8fa46d4864.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d96086774c42d9cf3ecd523c44c53a.png)
(1)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4fce1ca2e964321d98c1d568c9fee0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b624d88827e92e12bc0a8f1067cbe72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcafc95a0527841c29a58d4f7d85e232.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b123125e1709c8955554a84c23b5cfaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89e593828316139a54019e352dec883f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d9867693fabe11c5b9acf9cb2481343.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5868be6655f2c64a9966332b88c19b30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbdaa3d76d186bdd3435d949a6a4f8a0.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5ea9150353a7b53df03625c48d8327b.png)
(1)当
,求
的单调区间;
(2)
时,求
在区间
上的最小值;
(3)
若
使得
成立,求
的范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5ea9150353a7b53df03625c48d8327b.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d33da711e50e96568facb18cef27165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7754cc9374c8193dadb6875fb8a3fefb.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369e669ba3c9548cb3027f58d7c8b141.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f85bec096170ffcd5987a0572eb7e4bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de48324df1370f495b40a39303aaa15.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
|
适中
(0.65)
名校
【推荐2】已知
.
(1)求
的最大值;
(2)存在
且
,使
成立,求k的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc36a3c21811a9754a537062a73f43e6.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9c028b2602a85f0dd54d2baa21f94b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33bd24e647a626899a243a3f3984f90a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bafb531e008c6d7ad3da079a43f7ef06.png)
您最近一年使用:0次