已知函数
;
(1)当
时,
,使
成立,求
的取值范围;
(2)令
,证明:对
,恒有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7228adbe518453da012679c9a73b8774.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e10e1c43b86a8cd4360ca9b57232164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35eac3ba2858adffcd1f8052cd795269.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15773a778aaa7d49e45512f067d4a37c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bd94da68d9f9041a41b2f35b04bc58e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff0a56d85b77b24679275d3b8817a5b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88a07f230dc733027b7bf3bf0dbe8a47.png)
更新时间:2018-10-10 15:37:05
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适中
(0.65)
名校
解题方法
【推荐1】已知函数
.
(1)当
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(2)讨论函数
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(3)若对
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恒成立,求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b735944dfec6912b9c4152b8b0fbb3a.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)若对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d33d41d398944a02f613784ff1ceeaf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a71baf6217604517fd98fa97d0f55b43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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适中
(0.65)
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【推荐2】已知函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33556dfc7b2348b3f240849198da56b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75beac05ff31987303d0994a3a088162.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bea9227dd0104da58e0c40952cc87ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18feaed4f3dd7698210ba302c81dca6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bea9227dd0104da58e0c40952cc87ed.png)
(2)若对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/966b60302d80d8613675bb3dd5c03164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50b43637d6812e1d168ea848e5768913.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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适中
(0.65)
名校
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【推荐3】已知函数
.
(1)求
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(2)讨论
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(3)
恒成立,求实数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/088ad442f4c1e901e10255d3e09f141e.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b108ab31cc093f03cf48ad65429889e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
(2)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
(3)
![](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
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适中
(0.65)
名校
【推荐1】已知函数
.
(Ⅰ)求函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77e13a044328765cea64b88b55697d5a.png)
(Ⅰ)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0fee8487d331ce32f2a7f1f05e4e51f.png)
(Ⅱ)若存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d49ec515fb1fdc93ca4dda443326ad5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1568bb89f08ca6a71fc0942cb637975a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解答题-问答题
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适中
(0.65)
【推荐2】已知函数
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(1)讨论函数
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(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f679ec7277929ffead0e282c29183c40.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce3a34d6f60032718820c3da2b07786b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2749d590bdf00e76a4bbbcab87694659.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次