1 . 北宋数学家沈括博学多才、善于观察.据说有一天,他走进一家酒馆,看到一层层垒起来的酒坛(如图所示),不禁想到:“怎么求这些酒坛的总数呢?”“后来沈括提出了“隙积术”,相当于求数列
的和.如图,最上层的小球数是20,其中
,则这堆小球总数不可能是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/264f4f00-b379-49f7-8dd1-712a06a7e61b.png?resizew=185)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1a571501c5ffe5d37db0653a61eeb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a2dd76ebfcad012dd59032301f4dd1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/264f4f00-b379-49f7-8dd1-712a06a7e61b.png?resizew=185)
A.1100 | B.5200 | C.8100 | D.21300 |
您最近一年使用:0次
名校
2 . 已知数列:
;
,
,
;
,
,…,
;…,
,
,
,…
;…,则此数列的前2036项之和为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eff998d034284391ca064755fa6bf1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5337f3688eb5261c3d1c4682eea6db8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57717fff0ecfa65745ab87175e4ef4fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51dd36cdc994842315cb6b33ba6e2110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9792c7803677e0a6a60d7b4b1d26419d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecabfaab794a6218e082092a1b057763.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/922dab5a2938593bf50a3b580d568f18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5f294032347d80dba06576e4f6c028f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48b35159c34234ffee63bc7085b84ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/682ab5018df0aed155a64ac89fd98883.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cbf3b2926a01e58de6d05d8bc949e21.png)
A.1024 | B.2048 | C.1018 | D.1022 |
您最近一年使用:0次
2019-03-25更新
|
1956次组卷
|
8卷引用:江苏省苏州市高新区第一中学2020-2021学年高二上学期期中数学试题
江苏省苏州市高新区第一中学2020-2021学年高二上学期期中数学试题四川省成都市第十七中学2019-2020学年高一下学期期中数学试题安徽省六安市毛坦厂中学2019届高三3月月考理科数学试题内蒙古赤峰二中2018-2019学年高一下学期第一次月考数学(理)试题【市级联考】安徽省巢湖市2019届高三年级三月份联考数学(理科)试题(已下线)专题6.4 等差、等比数列与数列求和(练)【理】-《2020年高考一轮复习讲练测》2019届河南省郑州外国语学校高三全真模拟(三)数学(理)试题(已下线)专题19 数列求和-冲刺2020高考跳出题海之高三数学模拟试题精中选萃
12-13高一下·四川成都·阶段练习
名校
3 . 已知数列
的通项公式为
,设其前n项和为
,则使
成立的自然数n
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4acfae9db9e2f0e7904e0614c53a553.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/572ad94be91581e4ab3c92ef4be8cadb.png)
A.有最小值63 | B.有最大值63 |
C.有最小值31 | D.有最大值31 |
您最近一年使用:0次
2020-02-28更新
|
373次组卷
|
7卷引用:江苏省南通市启东中学2018-2019学年高一(创新班)上学期期中数学试题
名校
4 . 对于实数
,
表示不超过
的最大整数. 已知正数数列
满足
,
,其中
为数列
的前
项和,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8be7128f6acad82ab3ae66dfbca8a27e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4f5908d6a1217e493ed7586b6964dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9583a4d9bf7b954042226232d23a8c19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.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/8be7128f6acad82ab3ae66dfbca8a27e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2018-09-28更新
|
1761次组卷
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2卷引用:江苏省南通市启东中学2018-2019学年高一(创新班)上学期期中数学试题