2014高三·四川·竞赛
1 . 已知对一切的
恒有
.求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e381eefad61f9ca7b9862e058c90002.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9168274ae1d5f93647f01b4455a8d42a.png)
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2014高三·四川·竞赛
2 . 已知二面角
大小为
,该二面角内一点
到平面
的距离为
,到平面
的距离为
.若
,若
,则
周长的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91663c0acd1f2a36bd01b262b160eeab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ad1b0a76a887783392268ae203ad22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab41f50f397b0d57d4f73dc742be65f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735ef3d315886b4d9e8c40266fea638b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
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2014高三·四川·竞赛
3 . 已知公差为
的等差数列
满足
,且
是
的等比中项.记
,对任意的正整数
均有
则公差d的取值范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71e92a8c656b7c90f2210012fd47c3d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4ce64685821c3e55c07f151996ca8c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29cea2ccd66ac67d47088d657851efd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54cec7fb74f66ed9427356d7f7fac7a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b2b3131edf3aadf63fd067bd30ce37e.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2014高三·四川·竞赛
名校
4 . 过椭圆的左焦点
作倾斜角为
的直线l与该椭圆交于
两点.若
,则该椭圆的离心率为.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b342d5cb6dd1c84a82f6aca68ed829c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04f57bf36e92fae170161eca953aa767.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24117d8b2d86593891c6c9a70ee3f9fa.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2014高三·四川·竞赛
5 . 已知一个半径为6的球.则该球内接正三棱锥的体积的最大值为.
A.![]() | B.![]() | C.![]() | D.![]() |
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6 . 已知
为给定正整数,数列
满足
,其中,
是数列
的前
项和.令
,记
.若
,,求
的所有可能值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/283bf7895a60c9b22050c64d836abed2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee83ea6480cf8e70c08f35f3d949ec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba2009297249e304dce13e32c194d2c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0ee63caa3cc668857e7c0d04c75ad43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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2014高三·四川·竞赛
7 . 已知
为常数,函数
.
(1)求函数
的单调递减区间;
(2)若
,求
的极值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e62bf119a358aad53db797141e03b239.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4865c9add65c659e33a8ea3434e1e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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2014高三·四川·竞赛
8 . 设在
的方格表的第
行第
列所填的数为
,
.则表中共有五个1的填表方法总数为______ (用具体数字作答).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/954253b16a82489bb0e152543428c68a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7600d2cfbdc6146db96cc545706004f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cea71f85df9370063f74aadff1989f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70bd4029c61d2f61aec6aa83cd59d730.png)
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2014高三·四川·竞赛
9 . 设
则
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6195315088e5c5055cf5b381bf5c21a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0989519a8fabda693dd8bddaf58c2748.png)
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