1 . 下列结论成立的有( )
A.若两个等差数列![]() ![]() ![]() ![]() ![]() ![]() |
B.若数列![]() ![]() ![]() |
C.若数列![]() ![]() ![]() ![]() |
D.若数列![]() ![]() ![]() ![]() ![]() |
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2022-03-30更新
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3卷引用:浙江省金华第一中学2021-2022学年高一领军班下学期期中数学试题
浙江省金华第一中学2021-2022学年高一领军班下学期期中数学试题福建省宁德市部分达标中学2021-2022学年高二上学期期中联合考试数学试题(已下线)专题11 数列前n项和的求法 微点8 分组法求和
2 . 已知数列
,
,且
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/414187fca31df508dbf88d7f2bb83662.png)
______ ;设
,则
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebaf2a2590bb84d646957f913d78f6dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eba83359167d8ca8c9eafa8a23f34a92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80ef1533e7ff613155896cb80e123a54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/414187fca31df508dbf88d7f2bb83662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2c313d73eeee9eab6819b14fb80fde2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c59e7c7a84a4bdb959e95536d0404ceb.png)
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2020-06-10更新
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2卷引用:浙江省金华市东阳中学2019-2020学年高一下学期期中数学试题
名校
解题方法
3 . 已知数列{
}中,
,点
在直线
上,
(1)证明数列
为等比数列,并求其公比;
(2)设
,数列
的前
项和为
,若
,求实数
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bfccafa83afe5ee21eab6ef2b2c8852.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a41e2a3f83e1557fd61078f546da427c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d33f36167ebd325fe37978d955730e3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecd33421c2bd71702f1580c258fa4c45.png)
(1)证明数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca55f1c15e670e5df0bc87cb147a31e9.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2375493a8b56a46b206bcf6b5cea654.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bee4464b3b4eb6e52ee02f095aae84f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b708c8dcb2d66eb2ce0b3718a9cd924a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194bf0b3f7255c65a0fddd8bc0caf54f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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2020-03-16更新
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334次组卷
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2卷引用:浙江省金华第一中学2021-2022学年高一领军班下学期期中数学试题
4 . 已知数列
满足
,
,其中实数
.
(I)求证:数列
是递增数列;
(II)当
时.
(i)求证:
;
(ii)若
,设数列
的前
项和为
,求整数
的值,使得
最小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780a1b00ea3a4fec3069509041c84511.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a155c35d1f406ab70ce071afaf6558ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ad6aed46a20a642a1715ec6c095d637.png)
(I)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(II)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500d68f2678989a5ce7431cfd51b019d.png)
(i)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b4aebca20ea9e1aedb673f07bbb193c.png)
(ii)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d01824d6c9834ab0b39c1ad720780f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.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/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4d6d187831ce89050b04527ed3e0da2.png)
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