名校
解题方法
1 . 对于无穷数列
,定义:
,称数列
是
的“倒差数列”,下列叙述正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfc2dc4c056b8083fd2440ad322c9a20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
A.若数列![]() ![]() |
B.若数列![]() ![]() ![]() |
C.若![]() ![]() |
D.若![]() ![]() |
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2 . 在数列
中,若存在常数t,使得
恒成立,则称数列
为“
数列”若数列
为“
数列”,且
,数列
为等差数列,且
则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/414187fca31df508dbf88d7f2bb83662.png)
_____ (写出通项公式)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/994ecdc14d8f75451715f1031ccfb668.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e93815f534a9ba003799aef2a53a242.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e93815f534a9ba003799aef2a53a242.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3e82220a4b047f91ddd776149fd8cf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/414187fca31df508dbf88d7f2bb83662.png)
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3 . 已知各项均为正数的数列
的前n项和为
,且
,若
表示不超过x的最大整数,
,则数列
的前2024项和
( )
![](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/98170bd5b01b7a93f2cb6533a633ed37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2ab85825d4a002600ca41bd3cd2ee7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7f38294b2b027a27de82820af1439d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9018940318b725158ae598c0c5fc0ea5.png)
A.1012 | B.1011 | C.2024 | D.2025 |
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4 . 已知各项均大于零的数列
的前
项和为
,且
,则
的最小值等于______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0b066416d8d61e8666b3b9d5d24a789.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7fc751b8e3ce3aefeaf96898802c2ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08c9965a04c2a6de04e949a15762f372.png)
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5 . 设数列
满足
,
,且
.
(1)求证:数列
为等差数列;
(2)求数列
的通项公式;
(3)求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7def23f30138e0b7c4c1e498d6903a6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3938fc9093a10b040b5ed9d18c876637.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d82c65a855b1eed9c43e6829f6c3bffb.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(3)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cab430aa68825da3e65a59ae8f4e68b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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解题方法
6 . 数列
的前
项和
满足
.
(1)证明:
是等差数列;
(2)若
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.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/45ec2e0010061fa4dce1c9725b7ed739.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d292de307881f3f7835a89ed087b26a.png)
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2024-04-19更新
|
605次组卷
|
2卷引用:辽宁省部分学校2023-2024学年高二下学期4月月考数学试题
7 . 王先生为购房于2019年12月初向银行贷款36万元,与银行约定按“等额本金还款法”分10年进行还款,从2020年1月初开始,每个月月初还一次款,贷款月利率为
,现因资金充足准备向银行申请提前还款,银行规定:提前还款除偿还剩余本金外,另需收取违约金,贷款不满一年提前还款收取提前还款额的百分之三作为违约金;贷款的时间在一年到两年之间申请提前还款收取提前还款额的百分之二作为违约金;满两年之后提前还款收取提前还款额的百分之一作为违约金.王先生计划于2024年12月初将剩余贷款全部一次性还清,则他按现计划的所有还款数额比按原约定的所有还款数额少( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83ba85e8a856e9238c5f165e258d737a.png)
A.22450元 | B.27270元 | C.25650元 | D.27450元 |
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解题方法
8 . 19世纪的法国数学家卢卡斯以研究斐波那契数列而著名,以他的名字命名的卢卡斯数列
满足
,若其前
项和为
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cef698b332b71d6ee753fde436a0a7bb.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/5af1f1b7e9e20d799ee3c06b89a0611c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2024-04-19更新
|
207次组卷
|
3卷引用:辽宁省部分学校2023-2024学年高二下学期4月月考数学试题
名校
9 . 已知
是等差数列,
,且
的前n项和为
,
,且
成等比数列,点
在
上.
(1)求
及
;
(2)判断是否存在正整数m、k使得
、
、
成等比数列.若存在,求出所有m、k的值;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/c4ce64685821c3e55c07f151996ca8c3.png)
![](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/9186a380acea9af8b911de936123447d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7eb18614c7f1466ed722132f0d5e2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd1257210e2e8ea21b053f0857d04444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/999626ac9e7f3310b7f031953b93be45.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(2)判断是否存在正整数m、k使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/681ae1522a36768618f7ddaf74abbb7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22c854894d7a74582744df5e45d4c26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efae6cebf24728262ccd2df91904815d.png)
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解题方法
10 . 设数列
的前n项和为
,已知
,
,
,
是数列
的前n项和.
(1)求数列
的通项公式;
(2)求满足
的最大正整数n的值.
![](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/f6065aaa8f3f103d1bc960da8318ce35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/810d08ce985c6351ddcd57777f3894f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ce13ec00a3bec6db53eecf200cdf589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a79b3610518518bb81680e5e9712368.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)求满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2c6c854be54533ddb980cc5f1f32ce1.png)
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