1 . 拓扑结构图在计算机通信、计算机网络结构设计和网络维护等方面有着重要的作用.某树形拓扑结构图如图所示,圆圈代表节点,每一个节点都有两个子节点,则到第10层一共有______ 个节点.(填写具体数字)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/30/553f2881-4150-4f3a-b8b8-5d61f2d4f337.png?resizew=150)
您最近一年使用:0次
解题方法
2 . 已知数列
的前n项和为
,
,若存在两项
,
,使得
,则下列结论正确的是___________ .(填写所有正确的序号)
①数列
为等差数列;
②数列
为等比数列;
③
为定值;
④设数列
的前n项和为
,
,则数列
为等差数列.
![](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/60965815aa04043db051b7bd89eda80d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/681ae1522a36768618f7ddaf74abbb7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/300e2a4fd67460b554c5a1b6250b463f.png)
①数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
②数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd1f0ace9ca0b79929e73af6c201c2e.png)
④设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/322a562f21a7104a2a1e238bc2ddbe79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5603dc343728b22e51232c29f3f3078b.png)
您最近一年使用:0次
2022-01-15更新
|
571次组卷
|
4卷引用:贵州省贵阳市五校2022届高三11月联合考试数学(理)试题(三)
贵州省贵阳市五校2022届高三11月联合考试数学(理)试题(三)贵州安顺市2023届上学期高三期末数学(文)试题(已下线)2022年新高考北京数学高考真题变式题5-8题(已下线)2022年新高考北京数学高考真题变式题13-15题
解题方法
3 . 已知等差数列
的前
项和为
,且
,
,有下列结论:
①
;②
;③
;④
.
其中正确的是______ .(填写所有正确结论的编号)
![](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/d0d47abde02e3d7ffb3484878ba43c19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db78d2181208520e31797e6538e1c6d8.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7a47513805617d84ad1e248c5415e5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42fa3df245bef16f30ef05302998bd39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d8ee4c1f66f600c90d457a267aa0991.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/390636a89883bd64bf8da9bf8654aff9.png)
其中正确的是
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