已知等差数列
的前n项和为
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dbd9ff686703cad03aa383e5fec21.png)
______ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc4e70b360f988fdbd92300ab22c4613.png)
______ .
![](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/60ffc2fcd7a11cb9986661d585fb2bab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dbd9ff686703cad03aa383e5fec21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc4e70b360f988fdbd92300ab22c4613.png)
更新时间:2022-05-10 17:07:44
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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】设
是等差数列
的前
项和,
,
,则
的最小值为___________ .
![](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/d9453353c91d49cd679404ede7754d9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62ffe13ca9f8f219284596435b22e382.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4badebbf4cfdfdbe272975387b02a2bf.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】设等差数列
的前
项和为
,若
,则![](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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/323fee73667a95ac1af12e65dd7398b3.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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适中
(0.65)
解题方法
【推荐1】在锐角三角形ABC中,设A,B,C的对边分别为
成等差数列,则
的取值范围为_________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/850b38cc72de7c6e2c70b633c3e47f8c.png)
您最近一年使用:0次
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【推荐2】若实数
成等差数列,点
在动直线
上的射影为
,点
,则线段
的长度的最大值是_______ .
![](https://img.xkw.com/dksih/QBM/2016/8/16/1572978758139904/1572978763579392/STEM/da566ed9bfeb41bfb4370ef22e3d82ee.png?resizew=40)
![](https://img.xkw.com/dksih/QBM/2016/8/16/1572978758139904/1572978763579392/STEM/a6472c053ab64addb39aeb255a77755d.png?resizew=55)
![](https://img.xkw.com/dksih/QBM/2016/8/16/1572978758139904/1572978763579392/STEM/741bec515bec4bc09cd2966f76637210.png?resizew=97)
![](https://img.xkw.com/dksih/QBM/2016/8/16/1572978758139904/1572978763579392/STEM/af5a9c3bf82b4aac915f5e8fbe459e6d.png?resizew=21)
![](https://img.xkw.com/dksih/QBM/2016/8/16/1572978758139904/1572978763579392/STEM/f63a368517c14b68a3c07bacc54e2344.png?resizew=48)
![](https://img.xkw.com/dksih/QBM/2016/8/16/1572978758139904/1572978763579392/STEM/6edf1313bcd549c5aa9113f38c7b7bf3.png?resizew=31)
您最近一年使用:0次
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适中
(0.65)
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解题方法
【推荐1】已知各项均为正数的数列{an}的前n项和为Sn,且满足anan+1=2Sn(n∈N*),则a2+a4+a6+…+a66=______
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适中
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【推荐2】观察下列等式
,若类似上面各式方法将
分拆得到的等式右边最后一个数是
, 则正整数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99a3909e60dab4f0448037ad0c82c7a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36accab23dbd172687769aea43e5781c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7056d634173cbee2a7375265bd9cb604.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
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