已知数列
满足
.
(1)若
,证明:
(i)当
时,有
;
(ii)当
时,有
.
(2)若
,证明:当
时,有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a229ee29685c7ec745dcb07717478885.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86fc336b4a83bf6d66c4afcc431597f8.png)
(i)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/030f5b94af92e8995f3ba989f1a03d03.png)
(ii)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e167b43045b3297248e334c41c621b8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5930c0f0a7a529f37be1952d976401bd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5d0a73f50b3e4583f1c1b6d6bf0d18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e78a219a67a184a4307954aeeb33b4b.png)
2007高三·湖北·竞赛 查看更多[1]
(已下线)2007年全国高中数学联赛湖北省预赛试题
更新时间:2018-12-22 13:24:09
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【推荐1】设
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①求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4331a24db623aa0df9938c61f8fa009.png)
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①求
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②在
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③在
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【推荐2】在单调递增数列
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成等差数列,
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a44cfbb86a4eb76261c00ddc6bff181.png)
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【推荐2】已知平面上九个点,任两点间的距离都不小于1.证明:其中至少存在两个点间的距离不小于
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【推荐1】已知
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4da35a5fbce7f381e3631979d089336d.png)
(1)若存在正数a、b、c使不等式①成立,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca42ff2e3224281f0074bb1b5dd4e61.png)
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