已知数列
满足
,
,则
=______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95f9ca737b137a45f33a4cd1d25713c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91751ed79e4deefb3cee7762d204cf68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0788687e6ab60ab2a24f92e0aaf76372.png)
更新时间:2018-05-08 08:49:51
|
相似题推荐
填空题-单空题
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适中
(0.65)
名校
解题方法
【推荐1】已知各项为正数的数列
的前
项和为
,且
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7011a97eb8ca9ca2e322f0be081635b9.png)
,则数列
的通项公式为_________ .
![](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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7011a97eb8ca9ca2e322f0be081635b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0ba2efb4674cbc52ce744836fb0e21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
您最近一年使用:0次
填空题-单空题
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适中
(0.65)
解题方法
【推荐2】已知数列
,
,点
在直线
上,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a7bf78468ca801ef305ce4f76986da1.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2df4cb89147a85324ece512cd034bb44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e747e5274776e352f3d9ff5c2efc4b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a7bf78468ca801ef305ce4f76986da1.png)
您最近一年使用:0次
填空题-单空题
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适中
(0.65)
解题方法
【推荐1】记
为等差数列
的前
项和,已知
,
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.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/f966272f7781790ff27e40db6b525253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/185eb7967e13ada069ff64a009b07503.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a463973ed99e7607f61f2ae92caa34f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
您最近一年使用:0次
填空题-单空题
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适中
(0.65)
名校
【推荐2】已知数列
、
满足
.其中
是等差数列,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/045e4d6ebd7f891ca14758af887c5b90.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/01ae80d5735ef8ef108968804f411e1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2be33f90d2b84b35e05c42229af74b19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/045e4d6ebd7f891ca14758af887c5b90.png)
您最近一年使用:0次