已知数列
满足
,且
,其中
.
(Ⅰ)求
的通项公式;
(Ⅱ)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e550cef9250e15939f31e8823fb1bf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1933b7c3ace69622339353431c519b13.png)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(Ⅱ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9ef9d9fdd84e54f548e2fced45017a0.png)
20-21高三上·四川成都·开学考试 查看更多[2]
更新时间:2020-03-16 15:32:31
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适中
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解答题-证明题
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解答题-问答题
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解题方法
【推荐1】已知数列
满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7cfcf2148eb3d4544ff0c9e7e2b679b.png)
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项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7cfcf2148eb3d4544ff0c9e7e2b679b.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bf3da897eb73b729f66bb0d700775c5.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b676976524797205f5e4c99bee51a1c.png)
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【推荐2】已知数列
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