已知
(
为自然对数的底数).证明:
(1)
恒成立;
(2)
对一切正整数
均成立.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cd5a5dae0430248ab1f5b2ec3418977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e9c599e8d420006448905acec2b8234.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91979f56279f46f2d0c910f3dd7b35a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
2011高三·福建·竞赛 查看更多[1]
(已下线)2011年全国高中数学联赛福建赛区预赛试题
更新时间:2018-12-25 17:43:34
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解答题-问答题
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适中
(0.65)
【推荐1】已知定义在
上的函数
具有下列性质:(i)
;(ii)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e370a19e7a826121cf1493541fe8a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/961ac0f967b7c927970064ce496c53ca.png)
(1)当
为定值时,记
,求
的表达式;
(2)对
,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e89220eb96a4757f2988362bc04e80c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c316488ec17ce4034fe572a9c42e29e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e370a19e7a826121cf1493541fe8a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/961ac0f967b7c927970064ce496c53ca.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d321053d81c68f40374ff41795492a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f255d0395fba51ca2d44293cca42e0a.png)
(2)对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b33d2e39a60dcd54350f856a1c6d5e4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37d11037fb84507e5c56f36ca1373ff3.png)
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适中
(0.65)
【推荐2】已知
.数列
满足
,且
,
(1)求数列
的通项公式;
(2)证明:对一切正整数
均有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8de0861a5d6af9ca97bed91516bb07cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98142f66be474366eeb873ac38db78f4.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)证明:对一切正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5268a9bcd96232a05eb4ce8820550f2.png)
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适中
(0.65)
【推荐1】已知函数
,
,
.若将
的最大值记为
,试求数列
的最小值项.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d4d7e5c289d38088d276c2fa963efc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f7dbb416ec1ff1984a724a4f48bf692.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29d5ec9ad92f37e64eccce922ab1b14e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e89220eb96a4757f2988362bc04e80c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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(0.65)
【推荐2】求所有的正实数k,使得对于任意正实数a、b、c,均有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4273eddf5b3360f299e810a2abeb14d2.png)
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适中
(0.65)
【推荐2】求最小的实数
,使得对每个满足条件
的二次三项式
,适合不等式
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34808462fe97706cfe36ff29f0ea6144.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7eeb982b1f769a95116d19150b4b5712.png)
您最近一年使用:0次
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|
适中
(0.65)
【推荐1】已知函数
.
(1)若
恒成立,求a的最小值;
(2)若
存在最大值,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/083ad02d1a6ec52d79cee9321938a762.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fce85097fee1cbceeace9d1873fa71a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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适中
(0.65)
名校
【推荐2】已知
.
(1)讨论函数
的单调性.
(2)设
,若
在
时恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f78f4ddae51fb6300e669acbc5868bf.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7225c625819b7bfeb393a377ec2d74a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd8d12b0b64c9ac3bcb566dfa824906e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cc4136bd17997e11a7f8abcb19f9018.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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