设函数
.
(1)当
时,求证:
;
(3)若
对任意的
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fea2d2f8b3fd436ce3c5f7d450d8975.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0537af587b482ab6eea06ee944ae56f3.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b8806cf7a8fc63b64625ab53b3cf36b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/966b60302d80d8613675bb3dd5c03164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
更新时间:2017-09-02 13:01:12
|
相似题推荐
解答题-问答题
|
困难
(0.15)
名校
解题方法
【推荐1】已知函数
,函数
.
(1)当
时,若
对任意
恒成立,求
的取值范围;
(2)若函数
有两个不同的零点
和
,求
的取值范围,并证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f229405d050e38a680b952c88fd09513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89a09e7a9c895f7e305d2e7bd0c124f.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0f309c190855486e7ac1282a4460295.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aae51850c064c88bce599937078b345.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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c925afb8a29d41874a88acba80b2117d.png)
您最近一年使用:0次
解答题-问答题
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困难
(0.15)
名校
解题方法
【推荐2】已知函数
.
(1)当
时,判断
在
的单调性;
(2)设
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3bc6c761b979fe5d96e7f8fc8a113b0.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6335e7579ada89f23c50c623874bf06a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cb788ae88e457017bb81120b6a2e5ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e11d08d192f91827fe25df5567c60dce.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65b2d396592521bd5df10c84fd5d72eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7897929fbbea6fa808e87efb669d5af3.png)
您最近一年使用:0次
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困难
(0.15)
【推荐3】设
,函数
.
.
(1)讨论
和
单调性;
(2)若
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,
,
,问当
取何值时,
有最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3a806d4fce048653a03d49dfed29c08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/541ab5f6eaba73c4ed7faff20b1c7da3.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.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/84b5f32c09caa0be0d4c33be07aa4530.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8dc531505ec45b8eb8ae4fad88d69e8.png)
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
名校
解题方法
【推荐1】已知函数
,
.
(1)当
时,设函数
在区间
上的最小值为
,求
;
(2)设
,若函数
有两个极值点
,且
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93a35c267862c082fbdd4e6dce769de0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83eb829e3338a9e4be598124855685e8.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9210e75c35fb455d0446eb7ddba7d79c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/812b1efe6b4a2c6cdabfaf0d903bfecc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f252477a0de25fb08083c50b12b9fbb.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3c442579603164f3fc19458677d307.png)
![](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/26d8dafc71b106f39f4e15442220897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac6dce404b0bd7671b522eb99ca71f76.png)
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【推荐2】若m,n满足
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82902ff31f82e6857e4e598135861daf.png)
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(1)求实数
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(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a72b6d509c22b43f6f03e2d728bffa3b.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1】已知函数
.
(1)若
,求函数
的极值;
(2)当
时,若对
,
恒成立,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd04001d68fb2c7bce31c220f98a8bfd.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d33da711e50e96568facb18cef27165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f832d9cca2d5c9d76d38374e2a258d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61451cc73883c93bc9ab3ab00cae2d07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f15802a8683020919d225220fcc8681.png)
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
名校
解题方法
【推荐2】已知实数
,
,
.
(1)求
的值;
(2)若
对
恒成立,求a的最小值;
(3)当正整数
时,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/882b660047bb6ded500cedba57958e00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04f146c48c81d7148fa0acbb24e9716e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f35023b165fd0e156dc2264859bec204.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b3ec7ada52f4850719a970aeb59ca16.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1415277a2abd787827778054bd134d75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4088469fc818fd8b021460b4c90cccd9.png)
(3)当正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf343fa2731b063bc77ebed5b957c9ef.png)
您最近一年使用:0次