名校
1 . 已知正项数列
满足
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27e74d801cbfbce700fea259e9398879.png)
A.若![]() ![]() ![]() |
B.![]() ![]() |
C.![]() ![]() |
D.若![]() ![]() ![]() |
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3卷引用:福建省福州第一中学2021-2022学年高二下学期期中考试数学试题
2 . 已知数列
满足
,
.
(1)求证:数列
是等比数列,并求数列
的通项公式;
(2)记数列
的前
项中最大值为
,最小值为
,令
,称数列
是数列
的“中程数数列”.
①求“中程数数列”
的前
项和
;
②若
(
且
),求所有满足条件的实数对
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c41c8c4a4d20ddc700057c7df03c791d.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bf3da897eb73b729f66bb0d700775c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)记数列
![](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/6ddad3d9fdb5e9951b6a1c31f9a72a71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0a625b91e0eba33b107550ee2a1e2f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/293570f1284f5161d0c9e83c1aef7777.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
①求“中程数数列”
![](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)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e195bfeee892169b583158ad2363f5f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faf534a50982614f697e616657822285.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4c428c12bd1ab65b447a57547b33302.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efa6e6840235cbfe76f9827fc755d4cc.png)
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名校
3 . 已知数列
的通项公式为
,若数列
为递减数列,则实数
的值可能为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280ef092fa1a32c7ce9eb3a1161a4b5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
A.![]() | B.0 | C.1 | D.2 |
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4卷引用:福建省厦门双十中学2021-2022学年学高二3月月考数学试题
福建省厦门双十中学2021-2022学年学高二3月月考数学试题辽宁省锦州市义县高级中学2020-2021学年高二下学期4月考试数学试题(已下线)4.1 数列-2021-2022学年高二数学链接教材精准变式练(苏教版2019选择性必修第一册)(已下线)4.1数列(A 基础培优练)-2021-2022学年高二数学同步双培优检测(苏教版2019选择性必修第一册)
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4 . 设
是等差数列,其前n项和为
,
是各项都为正数的等比数列,其前n项和为
,且
,
,
.
(1)求
,
的通项公式;
(2)求
的最小值.
![](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/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebaf2a2590bb84d646957f913d78f6dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5170584604571b5e1afd5ece941e2e73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ccd2f83ee2f833d77fe8f508e36b7d9.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2f224ff614899329ca3abfa2627c049.png)
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5 . 已知等差数列
的前n项和为
,且
,
,数列
满足
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9b04a67551ffdc1f6fbd964b290eefa.png)
__________ ;若集合
共有6个元素,则实数
的取值范围为__________ .
![](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/6df1038200f2d97a52c716aab6c3bcb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd182ca2eac24d99cfa99758de936b00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a24e6bcf49b8e45531a2d4e4c70c181.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23eb8bbe7feb6fbe043528a5deda8335.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9b04a67551ffdc1f6fbd964b290eefa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40b392dcc0b5f1825cb4a6187f0bc66b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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解题方法
6 . 在
的展开式中,含
的系数是![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e077d2a31db1bbb1bce4b4ed30bbb03.png)
_______ ;若对任意的
,
恒成立,则实数λ的最小值是_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8b3be7745145925ed19852ca494bc67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0a89e3c30f6e4d4c5db4378b05d987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e077d2a31db1bbb1bce4b4ed30bbb03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e97769855336d73371930df1f187875e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1158ea0ddaf056c22bd3675424a9d794.png)
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名校
解题方法
7 . 已知数列
的前n项和为
,且
是
和1的等差中项,等差数列
满足
,
.
(1)求数列
,
的通项公式;
(2)设
,数列
的前n项和为
,求
的取值范围.
![](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/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aaee408bdec05bbdfcd4b841a331e61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bee04181b1fe91eb6a9abffc0ca2afe9.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/175005738672c8c1f431aac6333ab94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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8 . 对于数列
,若从第二项起,每一项与它的前一项之差都大于或等于(小于或等于)同一个常数
,则
叫做类等差数列,
叫做类等差数列的首项,
叫做类等差数列的类公差.
(1)若类等差数列
满足
,请类比等差数列的通项公式,求出数列
的通项不等式(要写出证明过程);
(2)若数列
中,
,
.判断数列
是否为类等差数列,若是,请证明;若不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7936359df4c926b72b48c6fdae55f12d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
(1)若类等差数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30d140c40a0f4e3c98d71437828245a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14835bf3f00139ccec0694d0924db795.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddda8e6c1ea80647c96a6b89ee544e1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cf1da18d91f7c98086553d157d1a87.png)
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解题方法
9 . 对于数列
,定义:
,称数列
是
的“倒和数列”.下列关于“倒和数列”描述正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7153ea724f256f1421ddfa3ef0088751.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![]() ![]() |
C.若![]() |
D.若![]() |
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解题方法
10 . 已知各项均不为零的数列
的前
项积为
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7978d7bd6f6caf9ac9837ffce5f89654.png)
_____________ ,数列
中项的最大值为___________ .
![](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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c947f95485bd6415e6d1881b2f9114bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7978d7bd6f6caf9ac9837ffce5f89654.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ffdda9c2f8787ed027e148ff5563b2e.png)
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