设函数
,
.
(1)讨论函数
的单调性;
(2)如果对于任意的
,都有
成立,试求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12c55b80adf7e2dca3215b9973ee5d01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4678069ce5297ed8cc72c1279bba485.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)如果对于任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19a1e2a087e3430738ae8745cf0d57bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25ddfe7d3ec160156380c1a673b913da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2022-04-20 11:09:17
|
相似题推荐
解答题-证明题
|
较难
(0.4)
名校
解题方法
【推荐1】已知函数
是自然对数的底数.
(1)若
,证明:
;
(2)若关于
的方程
有两个不相等的实根,求
的取值范围;
(3)若
为整数,且当
时,不等式
恒成立,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d6b43fc556c4b205abba37fc4a0dc9.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5967cc62862986840af4dd29df4bcc41.png)
(2)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fa757c82f454fe33f592264a7e4d08c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04391464f10c513e23be28dc5eeff88e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d347d5b8729ddc0417eb8eb0a13c7218.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】已知函数
.
(1)求函数的单调区间;
(2)如果当
时,不等式
恒成立,求实数
的取值范围;
(3)求证:
(
)(说明:
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5220c1d29955df47343122a463c46a92.png)
(1)求函数的单调区间;
(2)如果当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2fb40a36a293471742ce75f6b9635b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf0aab66798e1f60dc23c693c14e5a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(3)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60b31318fd60af358cd360a9665f0e56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8479d775017088fe0e6ad0e61b075591.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
解题方法
【推荐3】已知函数
的最小值为
.
(1)设
,求证:
在
上单调递增;
(2)求证:
;
(3)求函数
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3697d8321318c0ea408bbf340055dc9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/585de67a3fc494297d375d339af6d153.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/870ebc2f7aabb028024894568d749934.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d7a485fbf1d06e4ce1d06b15c78b703.png)
(3)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a75f9ce5eadb0f4dabe90388ce52b3fc.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
(
为实数)的图象在点
处的切线与直线
平行.
(1)求函数
的极值(其中
为
的导数);
(2)若对任意
,不等式
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c377e8b36373c4b76b9e3ed6066b9ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9f8845aa2b51c460f2d798c9f62fa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baabfd32465e9e50409413d9c1358279.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd7f74ae6ac70b73cc593578e759c942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724340d69477c0ec2418c392b22b1cab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071f145fa805374355aa56c87be751fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
解题方法
【推荐2】设函数
.
(1)若
在
上单调递增,求
的取值范围;
(2)若
,
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2abc5dfa9229c95adbddf9add4adc700.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e9c599e8d420006448905acec2b8234.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
解题方法
【推荐1】已知函数
(
,
),
.
(Ⅰ)讨论
的单调性;
(Ⅱ)若对任意的
,
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d417efa66d5781a2494808f8a3ff11d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5708e0190fdb73a493d6301d18d2b454.png)
(Ⅰ)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(Ⅱ)若对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43920f5171ed31db2520ef00e4c5fc24.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)
解题方法
【推荐2】已知函数
,
.
(1)讨论
的单调性;
(2)若对任意
,
恒成立,求实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6364a3b571969328b5190326dbe417c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1e9887228db607b7987c9d884e2194c.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
(2)若对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cc4136bd17997e11a7f8abcb19f9018.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447d6f62c09c1d05346fd16a24159f6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次