名校
1 . 已知等差数列
的前
项和为
,若
,
,则
( )
![](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/d3a9c6011a4c3a0d5d12c04f812a4fa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fddb4e22b75895e645a2e5bb37d92765.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc4e70b360f988fdbd92300ab22c4613.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2022-06-01更新
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1083次组卷
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4卷引用:辽宁省沈阳市第二中学2021-2022学年高二下学期期末数学试题
12-13高三上·黑龙江哈尔滨·期末
2 . 若数列
满足
,则称数列
为调和数列.已知数列
为调和数列,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92bc9b46b57545b59276bf125dfaf326.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9142ed6797531fbe7e6c61ec290b6a11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3100ae0145d424c88cf5cf7c0e394241.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43e49b5d5e162b81e9816f9229b8b349.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92bc9b46b57545b59276bf125dfaf326.png)
您最近一年使用:0次
2016-12-04更新
|
867次组卷
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8卷引用:2015-2016学年辽宁省实验中学分校高二上学期期末理科数学试卷
2015-2016学年辽宁省实验中学分校高二上学期期末理科数学试卷(已下线)2012届黑龙江省哈尔滨市第六中学高三上学期期末考试文科数学广东省高州市2020-2021学年高二上学期期末数学试题2016届江西省新余市一中高三第四次模拟文科数学试卷2016-2017学年安徽六安一中高二上理周末检测三数学试卷【全国市级联考】四川省眉山一中2017-2018学年高一下学期5月月考数学试卷宁夏银川一中2019-2020学年高三上学期第二次月考数学(理)试题(已下线)专题16 数列新定义题的解法 微点1 数列新定义题的解法(一)