1 . 定义
表示不超过
的最大整数,如
,
.若数列
的通项公式为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f32282b8c8366cf2cf1b7304f775be8.png)
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4f5908d6a1217e493ed7586b6964dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/032635d4e60381fb37c8f4e8f12805f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d54a0e82778f606d95a486835ac9f56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f32282b8c8366cf2cf1b7304f775be8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2889dd3096379db5dfdd51305bdbb743.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/938aa71e8a0b50d0477e60074769e460.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 某项测试有
道必答题,甲和乙参加该测试,用数列
和
记录他们的成绩.若第
题甲答对,则
,若第
题甲答错,则
;若第
题乙答对,则
,若第
题乙答错,则
.已知
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19fca3a54951441f67c18b21d1a36260.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07ae0b4264da6a8812454ffd2f20d94.png)
![](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/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea867f78d52b7382c38e8fc6e2e2a9c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/779579670dc48b0c0a9d31ed4df1e8ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47198e0da35b71d989eb679b517158f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22cd4e24144887b41b2d5eede1cbb97b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7325f0500a3f719a3c6184422be73a13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e8810d81198b0a48cdc551a7c5f2f89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19fca3a54951441f67c18b21d1a36260.png)
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2021-11-21更新
|
410次组卷
|
3卷引用:河南省2021-2022学年高三上学期期中联考理科数学试题
名校
解题方法
3 . 设
是公比为负数的等比数列,
为
,
的等差中项,
.
(1)求数列
的通项公式;
(2)设
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7755b0ec8df40da1e10c3567e441be7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/874e1398a3cdc4dfb36bf2a956b07463.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3b02b2d25602b385a0cec79e94aa6e3.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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
2021-11-21更新
|
642次组卷
|
7卷引用:河南省名校大联考2021-2022学年高三上学期期中考试文科数学试题
解题方法
4 . 已知数列
的前
项和为
,且
,
,则下列结论:①数列
是等比数列;②当
时,
;③当
时,
;④
.其中正确的有_____________ .(填序号)
![](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/613915e81a8eaf5363040516a6e27cfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a1a2208a768892a3db2e86abdae1164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194b8ab194c7d299d5c3e0f09ec18384.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/559fcc82e813f5d6c6d56675e0f360be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f970f380a12c843bb4a74ff34a15b2ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ae24081e1d9dd8753d1356e17101831.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c04bdf41109eee4f1921e5d1ad3b734f.png)
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5 . 已知定义在
上的函数
,
满足
,
,
,则数列
的前10项的和是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d7c2a263c586998d736a9debcfb7396.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041da6d7af7164297c1dbcdd3d8377aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b7ac7ff51dd5ef51568bd87cb69a644.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6914991d09dad824003623b6191a5673.png)
A.1024 | B.1023 | C.2046 | D.2048 |
您最近一年使用:0次
6 . 定义:若两个有限数列的首项、末项及项数对应相等,则称这两个数列为“同级数列".已知
是首项为
,公比为
的等比数列,等差数列
与
为“同级数列”.若数列
的项数为
,数列
与
的前
项和分别为
和
.
(1)求
;
(2)当
时,试比较
与
的大小,并说明理由;
(3)设
,数列
的前
项和为
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f67fd0eb54561cd1df683a08cf049bfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86fc336b4a83bf6d66c4afcc431597f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f67fd0eb54561cd1df683a08cf049bfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f67fd0eb54561cd1df683a08cf049bfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f67fd0eb54561cd1df683a08cf049bfc.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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a996c4e29bcc381353e072eb04c11b0.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21a56f4e1380569bc8bd3aabc8fa5730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d0a9523f2084cf17b8656c11ab1d95e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a996c4e29bcc381353e072eb04c11b0.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e70146038228e60fa47f079fb5854519.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.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/6ddad3d9fdb5e9951b6a1c31f9a72a71.png)
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解题方法
7 . 已知数列
的前
项和为
,若
(
为非零常数),且
,若
,则
的前
项和为___________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f67fd0eb54561cd1df683a08cf049bfc.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/5c8e678cb4e4bdee7f87374cb5132cc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d836a00b5e5fc994817d846097f42321.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ea7edf8285e5dcc6bdbdfd9fc01a4a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d02ea8c4988c5c28ab93f0d70fb55a.png)
您最近一年使用:0次
解题方法
8 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83e99119d426e266f76b858b0bfb1e5.png)
(1)若
,求
的值;
(2)证明:对任意的正整数
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83e99119d426e266f76b858b0bfb1e5.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e38c541dec8fce1d26886e5ef7d21f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)证明:对任意的正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41128626c741819cd5bbc6f31585358c.png)
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9 . 已知正项数列
满足:
,
,
.
(1)证明:
是等差数列并求数列
的通项公式;
(2)设
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5be425167c4cf003028d17267a0eade2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14835bf3f00139ccec0694d0924db795.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b012a5b5d4456f86eed09c698b9c07f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17c1cb5ecde6b0431f255112cf1c8668.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5be425167c4cf003028d17267a0eade2.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f052af7ec6eabf99cbea5543397cd1d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
您最近一年使用:0次
名校
解题方法
10 . 记数列
的前
项和为
,若
,
,则
( )
![](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/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/946c6e99ff591d860510f0fbc9a10b06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d78d551e6cc415f570dc7fc49b825cb1.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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