解题方法
1 . 在等差数列
中,
,则数列
的前8项和等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fccc6e52a2ba333642bf4991ca45905d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
A.16 | B.24 | C.32 | D.64 |
您最近一年使用:0次
2 . 已知数列
为等差数列,且
.设函数
,记
,则数列
的前13项和为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02de793e66f365b7d246ed1928e0655c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17f7292c22f04203772ac3dae5a03494.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc135b07188a5c3895fbff407c4d21d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1165edc23b5782b5942ef7e79130bb94.png)
A.![]() | B.![]() | C.7 | D.13 |
您最近一年使用:0次
解题方法
3 . 下列四个命题中正确的是______ .(填序号)
①若
为锐角三角形,且满足
,则
;
②若
,则
是等腰三角形;
③设等差数列
的前
项和为
,若
,则
;
④函数
的最小值为2.
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56ac8e446826ea6e653cd1ac6d5d6106.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b104867a12d24a353d94858c2fa17c8f.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e02e6946143207c276f7430942c1b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
③设等差数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.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/67c308f30a611601fa012aea0f31cd3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bbe68fbd86b4b9981cafbabb0d595cd.png)
④函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/164f75a66242a0fd2bb1166df0a18c78.png)
您最近一年使用:0次
解题方法
4 . 已知等比数列
为单调递增数列,
为一元二次方程
的两个根.
(1)求
的通项公式;
(2)若数列
满足
,数列
的前
项和为
,定义
为不大于
的最大的整数,
,求数列
的前n项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0158862238e250d2a2598b7d4ecd148.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13575cad220f645bcbf8db46975e77ea.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0f6000421c5370e4b89f23be199f388.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/2c4f5908d6a1217e493ed7586b6964dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1aebde0f1b9e0eaef499773d6d290e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ef4c4439b36c2847b0056a116d56d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e15526f7c892333030073b85fc3baee6.png)
您最近一年使用:0次
解题方法
5 . 已知数列
的前
项和为
,且满足
,
.
(1)求数列
的通项公式;
(2)若不等式
对任意的正整数
恒成立,求整数
的最大值.
![](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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78d657703ce3f6f5460119d249cd01b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74bc01b8c540c2ea89ff85b00630141b.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65f495dfc935e00f2cb7c063841db87b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
名校
解题方法
6 . 设等差数列
的公差
,且
,若
是
与
的等比中项,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/812be9806122241c476ba1db516c4823.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58365ff21052f2f978c11844b002b933.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f255d0395fba51ca2d44293cca42e0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5da4cd81500bdb43118150dbdb1541e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b4536c82a19c1bcd7a6f1952631bc1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
A.5 | B.6 | C.9 | D.10 |
您最近一年使用:0次
2024-02-25更新
|
179次组卷
|
2卷引用:1号卷·A10联盟2022届全国高考第一轮总复习试卷数学(文科)试题(十一)
7 . 定义数列
的公共项组成的新数列为
,则数列
的第101项为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/285ca918c9e5969016cba9988d16fd01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
A.2025 | B.2021 | C.2017 | D.2013 |
您最近一年使用:0次
2024-02-25更新
|
227次组卷
|
2卷引用:1号卷·A10联盟2022届全国高考第一轮总复习试卷数学(文科)试题(十一)
解题方法
8 . 已知单调递增的等比数列
满足
,且
是
和
的等差中项.
(1)求数列
的通项公式;
(2)若
,设数列
的前n项和为
,且对任意
,都有
恒成立,求实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3692d1cd54aaa7e2321fff5142e5d2c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61d473bfcc52ebc119430335531488a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3cfa8a317c2b60fa0fec595908d690d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b753dd63d46e4503e441fffde0d7e2.png)
您最近一年使用:0次
9 . 已知数列
满足
,设其前
项和为
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9802b88a42f53c02b479e8450183867.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/06fbdd2e3efbef1ff014df55b242eced.png)
A.2500 | B.2600 | C.2700 | D.2800 |
您最近一年使用:0次
2024-02-25更新
|
948次组卷
|
4卷引用:1号卷·A10联盟2022届全国高考第一轮总复习试卷数学(文科)试题(十二)
解题方法
10 . 已知数列
满足
.
(1)若数列
的前
项和为
,求
;
(2)若数列
的通项公式为
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bda5009d5d818436d0a6634d7af7f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16147b372388d2955433a04ad05004fc.png)
(1)若数列
![](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/4300dca231e2f4b37f70900b33439d5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b76f79be89b8c6227b68eded6b675546.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d3b7f9d64d513775a2bddc9475ab307.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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
2024-02-25更新
|
77次组卷
|
2卷引用:1号卷·A10联盟2022届全国高考第一轮总复习试卷数学(理科)试题(十)