已知函数
.
(1)
是
的导函数,求
的最小值;
(2)证明:对任意正整数
,都有
(其中
为自然对数的底数);
(3)若
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/863c24ec44174bdc5dd8ea9e67870563.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
(2)证明:对任意正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ac19e2a797cd0a408316988a63b3755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac021f53ead484c0c5a4b587e4479e07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/378262d6c1ec78505e88c563c30ddc5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
22-23高三下·河南信阳·阶段练习 查看更多[3]
河南省信阳高级中学2023届高三下学期3月测试(二)理科数学试题(已下线)第六章 导数与不等式恒成立问题 专题六 单变量恒成立之参变分离法 微点3 单变量恒成立之同构或放缩后参变分离(已下线)专题5 导数与不等式恒成立问题【练】
更新时间:2023-09-19 10:50:07
|
相似题推荐
解答题-问答题
|
困难
(0.15)
名校
【推荐1】已知函数
,其中
是自然对数的底数.
(1)设
的极小值为
,求
的最大值;
(2)若存在
使得
,且
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c70287eb26dc3102d4e40972144a6799.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a90170d7ef5ff6d1d63517c166f7a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a90170d7ef5ff6d1d63517c166f7a9.png)
(2)若存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9f58d4591d668b4bc32fae4faab8298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/859458471c86ae39e0cc42d2d960d03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e8d8441014892f9ad3dbaad3f89774e.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
|
困难
(0.15)
名校
【推荐2】设函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32b4d3b43a62261e0723e5b3528b6fd0.png)
(1)求f(x)的单调区间:
(2)当
时,若
,且
,是否存在实数k,使得
恒成立?若存在,求k的取值范围;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32b4d3b43a62261e0723e5b3528b6fd0.png)
(1)求f(x)的单调区间:
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bc9edb22a22dd339bf9f169e6642169.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd7ccf757d46f7f43f2cf40bedf7b0b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd339fd491a134c5e8a2bb7166769ee5.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
和
有相同的最小值.
(1)求
;
(2)证明:存在直线
,其与两条曲线
和
共有三个不同的交点,并且从左到右的三个交点的横坐标成等比数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1b419b4e28b846f17a2405f9bbaac84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5338d5d808deebf10d5fd32f040b55a.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)证明:存在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af79f45b5880c72a349500da9d8e118d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
【推荐1】已知函数
.
(1)求函数
的单调区间;
(2)若函数
的两个极值点分别为
,证明:
;
(3)设
,求证:当
时,
有且仅有2个不同的零点.
(参考数据:
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d797a2db981447da3e604690da4afca.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/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dabb97b3033a9915c9016df81df91b94.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ade931035db1a9b2f6f96ab9133148b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd60e69dac32dc020aacf5df042e5f2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ec068ca23b1226af6b27e20d57b87e9.png)
(参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74517b26a5a02c30c94f031d52d63014.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
名校
解题方法
【推荐2】已知曲线
在
处的切线方程为
.其中a、b均为实数.
(1)求
的值;
(2)若
是函数
的极小值点,证明:
.
参考数据:
,
,
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60c3f016897d3a48b9284ee25be6b864.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69f2d83a969d5e77227283657b2e3cf1.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9f2416d1f75a45a314331146550832e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ce5a92f518165ab26d1d7b252b06996.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed1e3e23692be2dac113f44963a841b2.png)
参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0465a01eacc172ac04f6df4c3cc972b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/587c2eff0049d62111eb5bbb1ea4ae67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9966cd01308069d06d974ebfb123619e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ebe8b6d7bf7d161100077d5549a0030.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
名校
【推荐1】已知函数
,
.
(1)
时,求函数
的单调区间;
(2)若函数
在
处取得极值,求实数
的值;
(3)在(2)的条件下,对
,
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2946a355e8ddd83c61ae79dfbf765669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.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/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)在(2)的条件下,对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d33d41d398944a02f613784ff1ceeaf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dc0ad5fe8e8c795f743e52eb459e4ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
名校
【推荐2】已知函数
.
(1)讨论函数
的单调性.
(2)当
时,若
有两个零点
,
,且实数b满足
恒成立,求实数b的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b11256a46317cfeca9d717a39696765f.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a34a424682726b5da7ac9d603e84839f.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/61bd2d931d708e242419e17e8c184923.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
名校
【推荐3】设
,
.
(1)若
在
上恒成立,求
的取值范围;
(2)若
在
上恒成立,判断
零点的个数,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14526aeb040bd612f3605e639d4a2d84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26214e10fa913100d7305136adcf47f3.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e9c599e8d420006448905acec2b8234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18c9aeed3c8c5a04e48d011c607f9142.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e9c599e8d420006448905acec2b8234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e390f45a8413c7b10023ea0d6543ca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
您最近一年使用:0次