设数列
的前
项和为
,且
.
(1)求数列
的通项公式;
(2)若对任意的
,不等式
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ddd6d99ad32dd7fdb1797d8cf94786.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)若对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dafd98e5b223908b13013c3cacc0386.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a14e886478fa1be29672a0a9a2933965.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
更新时间:2022-05-24 21:32:35
|
相似题推荐
【推荐1】在数列{an}中,a1=5,an+1=4an﹣3,令bn=log4(an﹣1).
(1)求数列{bn}的通项公式;
(2)记数列{bn}的前n项和为Sn,若不等式(﹣1)nkbn<2Sn+n+4对所有的正整数n都成立,求实数k的取值范围.
(1)求数列{bn}的通项公式;
(2)记数列{bn}的前n项和为Sn,若不等式(﹣1)nkbn<2Sn+n+4对所有的正整数n都成立,求实数k的取值范围.
您最近一年使用:0次
解答题-问答题
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适中
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解题方法
【推荐2】已知数列
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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解答题-证明题
|
适中
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名校
解题方法
【推荐1】已知数列{an}的前n项和为Sn,且满足
(n∈N*).
(1)求数列{an}的通项公式;
(2)求证:对任意的m∈N*,Sm,Sm+2,Sm+1成等差数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0feec6221f44b498b6a0c488c31477db.png)
(1)求数列{an}的通项公式;
(2)求证:对任意的m∈N*,Sm,Sm+2,Sm+1成等差数列.
您最近一年使用:0次
【推荐2】已知数列
中,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/208cf2b9b66054e4b5e276198136a9ae.png)
(1)判断数列
是否为等差数列?并求数列
的通项公式;
(2)设数列
满足:
,求
的前n项和
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
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(1)判断数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cf1da18d91f7c98086553d157d1a87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f052af7ec6eabf99cbea5543397cd1d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
【推荐1】已知数列
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(2)若数列
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(3)对任意的正整数
,设数列
求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18156edebadef55784d134dd2cbf1df8.png)
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(1)求
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(2)若数列
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed7f36631417499ac1b28cef905e2e42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1cb91e89800a81f4d62ed75c3ace24a.png)
(3)对任意的正整数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61331c1cb46803536a19394b97830630.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5708dea86b811fb62325641a578a7b8.png)
您最近一年使用:0次
【推荐2】已知数列
的前
项和为
,若
成等差数列,且
.
(1)求
的通项公式;
(2)设
,求
的前
项和
;
(3)设
,求
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
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(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e18038aee43d9dd7b334aecc44fae21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b8d0f17f24a822f2d652e2f6fdeb291.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ef4c4439b36c2847b0056a116d56d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐1】已知数列{an}中,a1=2,n(an+1﹣an)=an+1,n∈N*.
(1)设bn =
,求数列{bn}的通项公式;
(2)若对于任意的t∈[0,1],n∈N*,不等式
2t2﹣(a+1)t+a2﹣a+3恒成立,求实数a的取值范围.
(1)设bn =
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23171ee1a68add11487a256738098442.png)
(2)若对于任意的t∈[0,1],n∈N*,不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99383f8866965e6825aa3aba5a41a134.png)
您最近一年使用:0次
【推荐2】已知数列
的前
项和为
,点
在函数
图象上;
(1)证明
是等差数列;
(2)若函数
,数列
满足
,记
,求数列
前
项和
;
(3)是否存在实数
,使得当
时,
对任意
恒成立?若存在,求出最大的实数
,若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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(1)证明
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(2)若函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
(3)是否存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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