1 . 已知函数
,数列
、
满足
,
,
,
,
.
(1)求
的取值范围,使得对任意的正整数
,都有
;
(2)若
,
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fbd56fe7b6b14439638211d79f79eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/390636a89883bd64bf8da9bf8654aff9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d765033fa3e470b4b4bae90a28514587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbc5ac1542da56851d19240e723a1530.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ca42e7cd03df12843de137eb8843f37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66e713f441cb0f03cf7ca5d7f4cd157f.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2798e1dcab1f7f0fe3b8a94b3cd6a88.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b72ddd7de598464a37b10f03f67b904.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb774169e51010958807547268ca0430.png)
您最近一年使用:0次
2008高三·陕西·竞赛
2 . 设等差数列
的前n项和为
.若
则经过点
的直线的一个方向向量的坐标可以是.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08cb5ada9d32b692f212b180514c79b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae512fcc290a6352647228507d31dcf3.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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3 . 设函数
的最大值为
, 最小正周期为
.
(1)求
的值 ,并写出函数
的单调递增区间;
(2)若10个互不相等的正数
满足
, 且
, 求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21c215c27ee7f51edcfb0bbba343e1a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff8df5cb10e04ae048e67f3b5d2cf276.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若10个互不相等的正数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d23707e062bbdc42a260524be0931dc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/babcd88dfcc0c1155e41815c7a45219f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40bbaf184597390081392a2e39f3beff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d081a4fefbad6b7728cdb03e17e08e4d.png)
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4 . 对于实数
, 已知等比数列
的前三项依次为
,且该数列的前
项和为
.则满足不等式
的最大整数
的值是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29518f13a1ebc3fff8181c2d7cfba22f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8141ab662e34e2d1b2cd5a96e374231.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b708c8dcb2d66eb2ce0b3718a9cd924a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acca51fbc1bd02cc11cfdd81f0b236b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
A.2 | B.3 | C.5 | D.8 |
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5 . 等差数列
共有
项
,其中, 所有奇数项之和为 310 ,所有偶数项之和为 300 .则
的值为.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad4546b288340a9393260ed532171518.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2def5aa62f497709e1bd8258583d62fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4deeb1d48ba9103bd939d129bbcabf00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
A.30 | B.31 | C.60 | D.61 |
您最近一年使用:0次
2006高三·陕西·竞赛
6 . 已知
.设
,记
.
(1)求
的表达式;
(2)定义正数数列
.求数列
的通项公式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43e54404d8cd0dedc6d4646c38a446f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06a59ebf73675d85b7dfad852c6a591f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)定义正数数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cde37dac81d8c12b47855c03efc93346.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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7 . 已知数列
、
的前
项和分别为
、
,记
.则数列
的前10项和为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f5c583c98a1fd516c6ceaa60b55dec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c68b59aecbee4defb678fa95c3194d74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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8 . 对于任意的正整数
,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4b2ce6e2e21f858779893bbb518dc6c.png)
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9 . 已知数列
满足
.
(1)求数列
的通项公式;
(2)若数列
满足
,且对任意正整数
,不等式
恒成立,求整数m的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c186bf5506d78bdff3e7cba0d3794985.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec5611cdd9df40aa54ea9b71ce85c85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ac19e2a797cd0a408316988a63b3755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/974f315d577065a1b710e3ce7eb8402c.png)
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