等差数列
的前11项和
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e73e007519f1feb5a882b1be4ca36b0.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23aed3e24ab2b517b7daa9029f6316de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e73e007519f1feb5a882b1be4ca36b0.png)
更新时间:2018-11-06 16:12:05
|
相似题推荐
填空题-单空题
|
较易
(0.85)
解题方法
【推荐1】已知
为等差数列
的前
项和,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ace36494006e69293a4b03a10cf9c797.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/f989445707941d79072dbda428da80a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ace36494006e69293a4b03a10cf9c797.png)
您最近一年使用:0次
填空题-单空题
|
较易
(0.85)
真题
名校
【推荐2】若2、a、b、c、9成等差数列,则c﹣a=___________ .
您最近一年使用:0次
【推荐1】在数列
中,
,
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06fbdd2e3efbef1ff014df55b242eced.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1bae03ee4ac75dacfb026290e4207dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9b6e51986fe5d7a7265e0e93adcb4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea5e74250486d9557a4ddc655909e89e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06fbdd2e3efbef1ff014df55b242eced.png)
您最近一年使用:0次
【推荐2】已知数列
满足
,
,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/bbe7bdaaf8b0adf10bf2ef6c1255b1dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f144864642c7e6f45de9569fd59e42e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a7bf78468ca801ef305ce4f76986da1.png)
您最近一年使用:0次