1 . “让式子丢掉次数”—伯努利不等式(Bernoulli’sInequality),又称贝努利不等式,是高等数学分析不等式中最常见的一种不等式,由瑞士数学家雅各布.伯努利提出,是最早使用“积分”和“极坐标”的数学家之一.贝努利不等式表述为:对实数
,在
时,有不等式
成立;在
时,有不等式
成立.
(1)证明:当
,
时,不等式
成立,并指明取等号的条件;
(2)已知
,…,
(
)是大于
的实数(全部同号),证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30cdfc52dbd70827de9e15fffe39c321.png)
(3)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bc98a4d9ae0580aa2c1152ffb770d4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4fb8df3614557f13bdc68378437e90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d4045366a437d4003259050718e244.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f75f0daa973c8fc183b7d21bafd7e8cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c78998ba5f2665a1753c3fa84751716.png)
(1)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65a40142c84be68ee2918c3a8303388c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bc98a4d9ae0580aa2c1152ffb770d4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5026dc5ead3b5adf0e5f4b3e7c4eca1d.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a1cc5cfec94bc5686b41b043acdc8ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3282e5fde4ae53fcb1bb072a685304c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a37a59558292ad6b3d0978bfd7484990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30cdfc52dbd70827de9e15fffe39c321.png)
(3)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6b29215b2a741c01efc27199e6c6925.png)
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2024-05-30更新
|
285次组卷
|
3卷引用:2024年海南省海口实验中学高一学科竞赛选拔性考试(自主招生)数学试题
2 . 给定正整数
.求最大的实数
.使得
对任意正实数
恒成立,其中
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bcfc48f9bc23cc43085bdb910e7a136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/526e037512bd10e65ebd99b73aa26341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9304e71a623c4412188a800046a970d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/897b606fdc64a88a0938d3d60c3ea3e9.png)
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3 . 设
满足
,则
的最大值是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a521891098b625f372ff648d110afe1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30ecaa22eff643cdb7b78ad9eca37307.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1c9aed10b511457cd2c49f7de978c19.png)
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4 . 已知
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1867027eb8b757f45fe3615b4f5568d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f37dd18e733e38302305afc8099879.png)
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5 . 求具有下述性质的最大整数m:对全体正整数的任意一个排列
,总存在正整数
,使得:
构成公差为奇数的等差数列.(可以认为:两项也是等差的)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8748938373768d7172dc2a8d43ee2d4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0844d2b5218031f4a67807468b02653c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82079a5446d448fb1bea730b968d7e02.png)
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6 . 设
均为正数,证明:
(1)若
,则
;
(2)若
,则
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6aa7413d61d5f084dff82223388b5c5.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bde47288bc17f24c9a05ced2e48cb5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bddaa8662b7e7df9e093b924ea7aaea.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23067dc8ae6048baaf5507cbc5b76172.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6faf3b389d760578d8c1c3934c56c969.png)
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7 . 若正数
满足
,则
的取值范围是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f5152368dc55742d811b620ec2e23f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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8 . 已知实数
满足
,c满足以
为边长可以构成三角形.若使该三角形的三个内角中的最大角具有最小值,那么,c应等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/663a61ad241d5d874c9a9362f0ee917c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f5573b30734d65648f61c0a94c98de.png)
A.a | B.![]() | C.![]() | D.b |
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9 . 满足
的整数n=__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/874a27f6d645a7ecbb4a2463d67cbf3e.png)
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10 . 设
,且
.
证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/982d6f707facdb798f73aa4b7d30f992.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56667aabbe787eb1c3189d487d203e22.png)
证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d39fb6558167da3a51dec3830093731.png)
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