数列
中,
,则
的通项![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af93a69f9b370cd469ea70f346a293a9.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99503df11bf4daf3a86d34806564bc55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af93a69f9b370cd469ea70f346a293a9.png)
更新时间:2018-09-24 14:01:14
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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】一只蚂蚁从正四面体
的顶点
出发,每次只沿着棱爬行并爬到另一个顶点为一次爬行,若它选择三个方向爬行的概率相等,则蚂蚁爬行5次后仍在顶点
的概率为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
您最近一年使用:0次
【推荐2】在数列
中,
,
,且满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e79d780d74409e695c89a0fcb3646c7.png)
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed425fe0d43cddd48ddcdd43a0a95889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e79d780d74409e695c89a0fcb3646c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/855ce769f6795d1463744a0d74901fb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
您最近一年使用:0次
填空题-单空题
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解题方法
【推荐1】设数列
前
项和为
,满足
,
且
,
,则下列命题正确的是____________ .①
;②数列
为等差数列;③当
时,
有最大值;④设
,则当
或
时,数列
的前
项和取最大值.
![](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/0456970eff61052b7e72339923d5dbdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/390636a89883bd64bf8da9bf8654aff9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d66c520b8ab37c49a385db8c90432af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe2a6d5d85755462b0241d3749907e08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dea1dd4ffcb4cf0697ca43079f6a1f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5b1672953164c806fee8e7d6d8336c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/230ae9538a1b0ec62c3491cbce25df8f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
填空题-单空题
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(0.65)
【推荐2】有一些自然数排成的倒三角,从第二行起,每个数字等于“两肩”数的和,最后一行只有一个数
,那么![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73f4b04c45b214ed061fe2a43f5b51ef.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af5815a503758f95c613bbf3c2dd1df0.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3304e23f3b0f9569c4140ca89b6498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af5815a503758f95c613bbf3c2dd1df0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5453184e251cfe787b5965cd38426962.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3304e23f3b0f9569c4140ca89b6498.png)
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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
解题方法
【推荐1】已知数列
的前4项为1,0,1,2,写出数列
的一个通项公式,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
您最近一年使用:0次
填空题-单空题
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解题方法
【推荐2】在数列
中,
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3430e1eb6fe3a9ee34dca16e2ab5bad8.png)
______ .
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3430e1eb6fe3a9ee34dca16e2ab5bad8.png)
您最近一年使用:0次