名校
解题方法
1 . 设有穷数列
的项数为
,若正整数
满足:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62049e8d4125c051b977438d00a9e714.png)
,则称
为数列
的“
点”.
(1)若
,求数列
的“
点”;
(2)已知有穷等比数列
的公比为
,前
项和为
.若数列
存在“
点”,求正数
的取值范围;
(3)若
,数列
的“
点”的个数为
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1071ac8657ef1c4e1ea7e0530196298d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c134711f3361ee458f50d0811812416.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62049e8d4125c051b977438d00a9e714.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ffeaf19adeb6c4e00b1710c830f1a2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e008ee8b0dc593ce21d8d4c87afef1c.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20be766f78e1ddf67262f1e3ddf38968.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e008ee8b0dc593ce21d8d4c87afef1c.png)
(2)已知有穷等比数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.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/2b5a48b36ebd42e6cffcedead4c92388.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e008ee8b0dc593ce21d8d4c87afef1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee13d514d0fed5d1f4e26cf1af0554d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e008ee8b0dc593ce21d8d4c87afef1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b85de25b7a3b2ba699af730a15c02cc.png)
您最近一年使用:0次
7日内更新
|
101次组卷
|
2卷引用:重庆市开州中学2023-2024学年高三下学期高考模拟考试数学试题(四)