已知各项均为正数的等差数列
满足:
,各项均为正数的等比数列
满足:
,
.
(1)求数列
和
的通项公式;
(2)若数列
满足:
,其前
项和为
,证明
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2aa0b213f3dd113fab66a193873b6949.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be91b28843dcebe75578a9610c9a6186.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96b7b8f45c4af23b598b1bfee01db679.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25c2a5f8ec179b72b201c3c0a670612a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9adde0d99f886ea5c079b2eceeec93f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd9413b9ddb4476f2dd69ffbdb4ac401.png)
更新时间:2021-07-27 00:58:37
|
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解答题-问答题
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适中
(0.65)
名校
【推荐2】等差数列
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04b3fb2d128af923203f02e63d99e5b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af0dd3fb6af23def773e1b0032a4f3c5.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)已知:①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a55b060574fc845a669bd9f152ce3aee.png)
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解答题-问答题
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解题方法
【推荐1】已知等比数列
的前
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b28ef6f1b2279af482557a8ea46f2e43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a425978da20cebf8c4c63953579e7b35.png)
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(1)求数列
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/195431ccf2756a0db26f14b7b91a32a7.png)
(2)若数列
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您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】设各项为正的数列
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(2)令
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