已知函数
.
(1)若
有3个极值点,求
的取值范围;
(2)若
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d8eff3dc14de8ff5939ff18eec8a5d5.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d95df35db9ff7fde786093b08c257835.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
2024·四川·模拟预测 查看更多[3]
更新时间:2024-06-08 09:57:15
|
相似题推荐
解答题-证明题
|
较难
(0.4)
【推荐1】设函数
x∈R,其中a,b∈R.
(Ⅰ)求f(x)的单调区间;
(Ⅱ)若f(x)存在极值点x0,且f(x1)= f(x0),其中x1≠x0,求证:x1+2x0=3;
(Ⅲ)设a>0,函数g(x)= |f(x)|,求证:g(x)在区间[0,2]上的最大值不小于
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcac565b0bd0fcbef9dea98d06dcdfdd.png)
(Ⅰ)求f(x)的单调区间;
(Ⅱ)若f(x)存在极值点x0,且f(x1)= f(x0),其中x1≠x0,求证:x1+2x0=3;
(Ⅲ)设a>0,函数g(x)= |f(x)|,求证:g(x)在区间[0,2]上的最大值不小于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】设函数
,
.
(1)求函数
的单调区间;
(2)记过函数
两个极值点
的直线的斜率为
,问函数
是否存在零点,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2d53e84446ab2d482dd8cdfeb27b402.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/914a49b0d7aedc593a3e87fbab7c31ca.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f4a923c11440be7268df81508176467.png)
(2)记过函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/278d05f6d5b198fd36e4c681727eb0a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8413e920cf1bfa9d49cb1115255f2e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54b060eadab55b210842912f567519f3.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
解题方法
【推荐1】已知函数
.
(1)当
时,不等式
在
上恒成立,求实数
的取值范围;
(2)若
,
最小值为
,求
的最大值以及此时
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9983ad87d10ee0472c16f3a73c06abc7.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df4676ffe41299e1eabd062a5f4303a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a244c26d76eb6887b4c1eb0605a53005.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41f7464e7559a63bba3915987982fa9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eee81a2dc0bc88067e545f1a4c48af9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eee81a2dc0bc88067e545f1a4c48af9b.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
|
较难
(0.4)
【推荐2】已知函数
.
(1)讨论
的单调性;
(2)当
时,
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e949b7169aec9e42ba2299f39789050.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2fb40a36a293471742ce75f6b9635b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/332085261c6e59ceb3dfbadce0ddb1d8.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
|
较难
(0.4)
名校
【推荐3】已知函数
(
).
(1)当
时,试求函数图像在点
处的切线方程;
(2)若函数
有两个极值点
、
(
),且不等式
恒成立,试求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a57cc020e1c3b009474b3170755c884.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89b89f8393d9c40363fafd780f9ee625.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b672f564d03ed46d092bb130f229ad8.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/26d8dafc71b106f39f4e15442220897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9148cf58ae8f77a29d4a2bade65bee7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
【推荐1】已知函数
.
(1)试讨论函数
在区间
上的极值点的个数;
(2)设
,当
时,若方程
在区间
上有唯一解,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da503d9093fda47516b1c81958da2554.png)
(1)试讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a3cee5e50ee4f1dfbcf0ff0312fef1b.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75da58cac334f8cbc7b3b0c6529efac5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a9589f30699d1a766f1e700cc88a344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cc21e93af4dbd78a5a8b6c08b169e1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18c9aeed3c8c5a04e48d011c607f9142.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】已知函数
.
(1)求函数
的单调区间;
(2)若函数
有两个极值点
,
,求当a为何值时,
取得最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04e9893aef74180b1200906e3d769d88.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b916df8bdd03ba4a31c0b8470d13436.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af3b6a0621b958176479b23cf24a6cd3.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐3】已知函数
.
(1)讨论函数
的单调性;
(2)若函数
有
个零点,求
的范围
(3)若函数
在
处取得极值,且存在
,使得
成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bf3a2ca5682a08d4007afef89257035.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724340d69477c0ec2418c392b22b1cab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66692ec49a458f9e48c7315d03dfc37b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6e90d9742228fd7b825c060615ee5d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
您最近一年使用:0次