名校
解题方法
1 . 已知数列
是等差数列,其前
和为
,
,
,数列
满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b343307c9d1ae2ab87fdcd873782933.png)
(1)求数列
,
的通项公式;
(2)若对数列
,
,在
与
之间插入
个2(
),组成一个新数列
,求数列
的前83项的和
.
![](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/9c9b6e51986fe5d7a7265e0e93adcb4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b2395ccadbeb8353ead0d573ca02c25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b343307c9d1ae2ab87fdcd873782933.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)若对数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f255d0395fba51ca2d44293cca42e0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/217b927efe12a98e1082ecd7f035b921.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/233427826eb2233641fc3a9805f6d206.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cad52924df9291d5d191d18e09374ee1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b783cf91e34e692ce8e171f0965cb53f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b783cf91e34e692ce8e171f0965cb53f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea50a511b4b1adecf65c932327d07031.png)
您最近一年使用:0次
名校
解题方法
2 . 在等差数列
(
)中,
,
.
(1)求
的通项公式;
(2)若
,数列的
前
项和为
,证明
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2771c5f04582c545e0f9afc8a2cb9597.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cff0abcfc9ed6c1afdd6d4ca61a19897.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a38c5d56a437f36bde9ce723233e0063.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/856314ac1667503a2dc071f5a6018424.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.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/47bcba5b14edadd8fb6a18bf6efdb54c.png)
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3 . 对任意正整数
,定义
的丰度指数
,其中
为
的所有正因数的和.
(1)若
,求数列
的前
项和
;
(2)对互不相等的质数
,证明:
,并求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99ec17676996879870aeb947e931281b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25604acf458df2246bcd741388e5e8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b06689b669942410af2886e51c9a7071.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0496f142d8ae5acb06e83526eaa3ef87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
(2)对互不相等的质数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e7bb6cdf4cfc9f9e285296828df381e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7b2888ffbc4c6d686acc42384c2a465.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/321f6d53f6353580f496ad41532c4817.png)
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2卷引用:江西省多校联考2023-2024学年高二下学期6月摸底考试数学试题
名校
4 . 已知
为等差数列,
是公比为2的等比数列,且
,求集合
中元素个数__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9577321bd85f232a0fecb06639171e90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db84e10c0bfea0a3357785f7cfc9a2b2.png)
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5 . 已知数列
的各项均为正数,
,且
.
(1)求证:数列
是等差数列;
(2)若数列
满足
,是否存在正整数m;使得
成立,并说明理由.
(3)设
,数列
是以4为首项,2为公比的等比数列,现将数列
中剔除
的项后、不改变其原来顺序所组成的数列记为
,求
的值.
![](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/13329a5b1517d73967dbf217d0e6eec3.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cf1da18d91f7c98086553d157d1a87.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fce6088528ede0b8d923daf74c0ecd2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f8584e2a691794f6a27974ffa282866.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3491afd226c04a1c159ce261af8510ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b783cf91e34e692ce8e171f0965cb53f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b783cf91e34e692ce8e171f0965cb53f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/272b44a71d0bec02b3c4f3f05304f942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a4ac00908d2c853f18a3bf0183dc233.png)
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名校
解题方法
6 . 已知数列
的前
项和为
,下列说法正确的是( )
![](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/696d0e6b9013d2e5fdf3feb280c58e18.png)
A.若![]() ![]() ![]() ![]() |
B.若![]() ![]() ![]() ![]() |
C.若![]() ![]() |
D.若![]() ![]() |
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名校
7 . 在各项均为正数的等比数列
中,
,
,
成等差数列,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be78feec41e2b2ca828ee07feb8aa0c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d479842818cdc157624e4e89b708075.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2b42a580c957be7f0fe5e0de6693d69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f966272f7781790ff27e40db6b525253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb5905a1755bf66784021797d628751c.png)
A.14 | B.28 | C.42 | D.56 |
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8 . 已知等差数列
的公差d≠0,且
,
,
成等比数列,
的前n项和为
,
,设
,数列
的前n项和为
,
(1)求数列
的通项公式;
(2)若不等式
对一切
恒成立,求实数λ的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d04a8b7a7595251251b8e0b7e665e8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34bc3df3bea2def2fd30b0f90d75ef32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/666c4baf8ded0a8c4788b67f316e81f9.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/24f39fbe22dd891ead500de7e77ab3b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e0a11035037cfd4240c48bc89661374.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e922c4273aaef507f569cf67ab3d6537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
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9 . 已知数列
的前
项和为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a717bebdf6ad7e11db845d5f58cec33.png)
(1)求数列
的通项公式![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)判断数列
是否是等差数列,若是,加以证明;若不是请说明理由;
(3)求
的最小值,并求
取最小值时
的值.
![](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/7a717bebdf6ad7e11db845d5f58cec33.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)判断数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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解题方法
10 . 在数列
中,已知
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c0eddd71d4fa6c78b1a410784bafb16.png)
(1)求
,
的值;
(2)是否存在实数
,使得数列
为等差数列?若存在,求出
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/f6065aaa8f3f103d1bc960da8318ce35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c0eddd71d4fa6c78b1a410784bafb16.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
(2)是否存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e6224c0adf74d78a27ba6d4222840b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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