已知数列
,且满足
(
且
),证明新数列
是等差数列,并求出
的通项公式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46b189de482790643b6bacf7827c40be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a44c2fff867afb37d52ef2bb06769c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d82c65a855b1eed9c43e6829f6c3bffb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
2022高三·全国·专题练习 查看更多[2]
更新时间:2021-10-04 16:18:56
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(2)若
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【推荐2】下面图形都是由小正三角形构成的,设第
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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① ② ③ ④
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【推荐1】数列
满足
,且
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的通项公式;
(2)记
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项和
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7d9e8f6441c98a309c2ab63017b8301.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18d8e8f821111de8075e5c3dfb22a5d6.png)
(1)求数列
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(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5256c2910b22f44f9d5f42d13ad767b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
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【推荐2】已知数列
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