名校
解题方法
1 . 已知正项数列
的前n项和为
,且
.
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d292de307881f3f7835a89ed087b26a.png)
(2)在
与
间插入n个数,使这
个数组成一个公差为
的等差数列,在数列
中是否存在3项
,(其中m,k,p成等差数列)成等比数列?若存在,求出这样的3项,若不存在,请说明理由.
![](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/6e63c6f150443df12cd30ba72043667a.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d292de307881f3f7835a89ed087b26a.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/090426eb29836bc30c006b3739c08057.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3468a665ac713ab7b400c672f19650a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82e260b088f071983f254ce8f5163fcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b783cf91e34e692ce8e171f0965cb53f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7761cc0df6a09d1d7b6749959aecdec4.png)
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2024-01-10更新
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3卷引用:重庆缙云教育联盟2024届高三高考第一次诊断性检测数学试卷