名校
1 . 已知函数
.
(1)讨论函数
的单调性;
(2)若
对
恒成立,求
的取值范围;
(3)当
时,关于
的方程
有
个不同实数根,写出
的值.(结论不要求证明)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab1bddfef64fbbb3813ab910dc4ac9a1.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a1bef02cef1e8319040a678b5fab599.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cc4136bd17997e11a7f8abcb19f9018.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b7393fc425948d4261bb6c7d67f88e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5145940e345d21bf829f4e278d9f1d08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b06e95b57b7a81cd81d05557a11fa92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/980ab4deb9e7f2bc9288787f5243a4d2.png)
您最近一年使用:0次
名校
解题方法
2 . 已知函数
,且
在
处取得极值.
(Ⅰ)求b的值;
(Ⅱ)若当
时,
恒成立,求c的取值范围;
(Ⅲ)对任意的
,
是否恒成立?如果成立,给出证明;如果不成立,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7000aabdb9de2f025261d7e95275907.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
(Ⅰ)求b的值;
(Ⅱ)若当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6070f2ee5e48cce77eb4a2cb9f11ccfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/190a670794c40368119afdcc98341f76.png)
(Ⅲ)对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fb628785e792d48f00e2a8484bc9d50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43ec783a91f4471ce8a21a9bf894ef57.png)
您最近一年使用:0次
2020-11-21更新
|
481次组卷
|
4卷引用:北京市第四十四中学2021届高三上学期期中考试数学试题
名校
解题方法
3 . 已知函数
.
(1)当
时,求曲线
在点
处的切线方程;
(2)求
的单调区间;
(3)设函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e259d5f49d78c4e40cc44422c31dc38.png)
①若
在
上单调递减,求a的取值范围;
②若
存在两个极值点
,
.证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16b7ac6aa2ea754de988af76b40c7c3d.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bea9227dd0104da58e0c40952cc87ed.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e259d5f49d78c4e40cc44422c31dc38.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61c388166862b3ccfcc7ca749ebe5949.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8938db94f49dcbe0c383fba0241bb0da.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61c388166862b3ccfcc7ca749ebe5949.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/e01d0bf28e7312e90907e0d05b62c30b.png)
您最近一年使用:0次
4 . 已知函数
.
(1)当
时,求
在
处的切线方程;
(2)当
时,求证:
对任意
恒成立;
(3)设
,请直接写出
在
上的零点个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0bcc54500ca8a6e6eaf78940c01404b.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c67a7e28dba059006021a2e2105f538.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b4955c5adc717b7f6f0b975e0724ff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2fb40a36a293471742ce75f6b9635b8.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2c82e93ff00950c348d04ea75f5edef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb7df298a9364b36e079a61caec815c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeb49dbba01c4ff5f686ffc8828351b2.png)
您最近一年使用:0次
名校
5 . 已知函数
.
(1)求函数
的极值;
(2)证明:当
时,曲线
恒在曲线
的下方;
(3)讨论函数
零点的个数.
参考公式:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3db43120cc632891762bf783201316f6.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/344ccbf79da6ad7e3709d6fa72efb756.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f2eff609c6043c2a89a6dd163fe2244.png)
(3)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ee7e0fba5abb4193f070f95fc5bbade.png)
参考公式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7a17290b3b75dfb2324e355cf2f3f4a.png)
您最近一年使用:0次
6 . 已知函数f(x)=(3x﹣2)ex.
(1)求曲线y=f(x)在点(0,f(0))处的切线方程;
(2)求证:
;
(3)令g(x)=f(x)﹣
(x﹣2),其中
<1,若存在唯一的整数x0使g(x0)<0,求
的取值范围.
(1)求曲线y=f(x)在点(0,f(0))处的切线方程;
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65339453dcadc2aa536462167fbc3a2f.png)
(3)令g(x)=f(x)﹣
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
名校
解题方法
7 . 已知函数
.
(Ⅰ)求函数
的极值;
(Ⅱ)求证:当
时,
;
(Ⅲ)当
时,若曲线
在曲线
的上方,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e661c740d0c0df21ba11eb63c38d4372.png)
(Ⅰ)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(Ⅱ)求证:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cc4136bd17997e11a7f8abcb19f9018.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/221a966493f3561c24a7187a5c63d119.png)
(Ⅲ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91bb0d290ce1591625a587fbcfb7d750.png)
您最近一年使用:0次
2020-06-23更新
|
1015次组卷
|
9卷引用:北京市丰台区2020届高三下学期综合练习(二)(二模)数学试题
解题方法
8 . 已知函数
,
.
(1)若
恒成立,求a的取值范围;
(2)当
时,函数
的图像与直线
是否有公共点?如果有,求出所有公共点;若没有,请说明理由;
(3)当
时,有
且
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ea400e6c5e28322f5b5c8f8522e1da8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dd8b3dc4c609bab82d356a5cc2208d.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e9c599e8d420006448905acec2b8234.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66d6e08526a91f8dfd160e7da2f92a3a.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b108ab31cc093f03cf48ad65429889e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/859458471c86ae39e0cc42d2d960d03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33bd24e647a626899a243a3f3984f90a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03ca13a93b5f401c0d39ba52b0cffcb0.png)
您最近一年使用:0次
名校
解题方法
9 . 已知f(x)=ex+sinx+ax(a∈R).
(Ⅰ)当a=﹣2时,求证:f(x)在(﹣∞,0)上单调递减;
(Ⅱ)若对任意x≥0,f(x)≥1恒成立,求实数a的取值范围;
(Ⅲ)若f(x)有最小值,请直接给出实数a的取值范围.
(Ⅰ)当a=﹣2时,求证:f(x)在(﹣∞,0)上单调递减;
(Ⅱ)若对任意x≥0,f(x)≥1恒成立,求实数a的取值范围;
(Ⅲ)若f(x)有最小值,请直接给出实数a的取值范围.
您最近一年使用:0次
2020-06-22更新
|
636次组卷
|
2卷引用:北京市东城区2020届高三第二学期二模考试数学试题
解题方法
10 . 已知函数
,
,其中常数
.
(1)当
时,不等式
恒成立,求实数
的取值范围;
(2)若
,且
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1f5e01c96aab191d2519c97debb7931.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/761e6a4c93c78be1d3da2f091b37939d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/966b60302d80d8613675bb3dd5c03164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/018857ec6e498113b3b12a730d9313da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52c50ec0b428be702f9e280ffb5207fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05fce924911d5ed93147dfce9e41c2b0.png)
您最近一年使用:0次