1 . 已知函数
,
是f(x)的导函数.
(1)证明:当x>0时,f(x)>0;
(2)证明:
在(
)上有且只有3个零点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1aa256d6c99bc57c19a10f5033e4f89b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4b04824a308519a61318a82aa97a05.png)
(1)证明:当x>0时,f(x)>0;
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75cd5dc9ea94dd613d320e39b78a2f10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a597eeca115813850eae176447f142b3.png)
您最近一年使用:0次
2020-06-25更新
|
1129次组卷
|
5卷引用:山东省泰安市2020届高三四模数学试题
山东省泰安市2020届高三四模数学试题山东省泰安市新泰市第二中学2020届高三第四次模拟考试数学试卷山东省泰安市2020届高三第四轮模拟复习质量数学试题(已下线)专题八 函数与导数-山东省2020二模汇编(已下线)模块检测卷一(B卷 滚动提升检查)-2021年高考数学一轮复习单元滚动双测卷(新高考地区专用)
2 . 设函数
.
(1)设
是
的极值点,求
,并讨论
的单调性;
(2)若
,证明:在区间
内,
存在唯一的极小值点
,且
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c35c7e4144f417a28adea4d80fb45bc.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/368e657d8ad0fd9b14b21db3f7369a7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f436566ce8c86fda35b85bd3c26683.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2367b48e8f6dbbfe3dd14f6eab8238a5.png)
您最近一年使用:0次
2020-06-16更新
|
592次组卷
|
3卷引用:辽宁省丹东市2020届高三下学期总复习质量测试(二)数学(理)试题
3 . 设函数
.
(1)当
时,求曲线
在点
处的切线方程;
(2)若
,证明:在区间
内,
存在唯一的极小值点
,且
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c35c7e4144f417a28adea4d80fb45bc.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b7393fc425948d4261bb6c7d67f88e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5828873f8369183faf71181cda5b61d2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c43f0abd5ca6f475282fc29ebcefce5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f436566ce8c86fda35b85bd3c26683.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2a8d6dcc96c6392f45a42fb413984e2.png)
您最近一年使用:0次
4 . 已知数列
的首项为
,且满足
,则下列命题:①
是等差数列;②
是递增数列;③设函数
,则存在某个区间
,使得
在
上有唯一零点;则其中正确的命题序号为________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27299c033156ea65106c0d4bafac1c0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bf3da897eb73b729f66bb0d700775c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4559687773d5c1ae8050fe870fbf96c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc64d7327301a81a8b80fa4a24331f18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d94e5edc48a908e96404888ec8cc32b.png)
您最近一年使用:0次
2020-06-13更新
|
664次组卷
|
5卷引用:2020届上海市七宝中学高三三模数学试题
5 . 已知函数
恰有一个零点
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7c99cafc828f58fa6efef8b2b2a08bc.png)
(Ⅰ)求a的取值范围
(Ⅱ)求
的最大值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4806dcca34b75b6ad79657cdf4ed8f08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7c99cafc828f58fa6efef8b2b2a08bc.png)
(Ⅰ)求a的取值范围
(Ⅱ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
您最近一年使用:0次
2020-06-12更新
|
720次组卷
|
2卷引用:浙江省温州市2020届高三下学期6月高考适应性测试数学试题
6 . 设函数
,满足
,若
存在零点
,则下列选项中一定错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e191f63216ec142b7fe24faf6b63f52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03a641a6bd7a96f275db9b91fcb3d0b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
7 . 已知函数
.
(1)讨论
在
上的单调性;
(2)当
时,求
在
上的零点个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd57411123af7327d9be39c4065b358.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84a7a4a037a4dfe973f1eb683d93d799.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7e97a6e8c8e1e12ef6be4553c5364f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56bf734452fa19c3c36d0f9c2ce52be2.png)
您最近一年使用:0次
解题方法
8 . 已知函数
,
,m,n
R.
(1)当m=0时,求函数
的极值;
(2)当n=0时,函数
在(0,
)上为单调函数,求m的取值范围;
(3)当n>0时,判断是否存在正数m,使得函数
与
有相同的零点,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2f71b8a596721924cc1cc10a156a5db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6e66e9288a329efcf40c4c2c2c71cf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02d44492b51b0e08208fdc0d1707025.png)
(1)当m=0时,求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)当n=0时,函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f53acc676c43c13aa47dcc3e2719b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e055bc46d3fa50e79532ec5b3665d99b.png)
(3)当n>0时,判断是否存在正数m,使得函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
您最近一年使用:0次
9 . 已知
,
,
,则实数
,
,
的大小关系是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7521d46c07eba26b606356a9683c949a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/744690c50456176c1caa045f94808818.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d0e6b5436548d105a9bd7d0c0923ff9.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)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-05-24更新
|
819次组卷
|
3卷引用:2020届四川省达州市高三第二次诊断性测试数学(文科)试题
10 . 已知
,其中
是实常数.
(1)若
,求
的取值范围;
(2)若
,求证:函数
的零点有且仅有一个;
(3)若
,设函数
的反函数为
,若
是公差
的等差数列且均在函数
的值域中,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/585e4133c70e344cccf3f5cf88477251.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab894a4dbac9de748af72402cddd5e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c9afb528423ed6c19355ca8bd8f2359.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dec99c57bf7997bd93e1ed8f48d5af9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4ce64685821c3e55c07f151996ca8c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4885fce16581c9a536477f813e783f88.png)
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