1 . 在等差数列
中,已知
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3421b7347b88cd21c21a88d51ac8fb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ebce85ea9bc18815ef8887057030a63.png)
A.4 | B.8 | C.16 | D.32 |
您最近一年使用:0次
2021-03-27更新
|
226次组卷
|
2卷引用:广西南宁市五中、九中、十中等16校2020-2021学年高二上学期期末联考数学(理)试题
解题方法
2 . 如果数列
的前n项和
满足
,则此数列的通项公式为( )
![](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/305f291518c84f7a4414fe1a38c8e534.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2021-03-22更新
|
232次组卷
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2卷引用:广西来宾市2020-2021学年高二上学期期末数学(文)试题
3 . 已知数列
为等差数列,
是其前n项和,且
,则
( )
![](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/a77159feb154fb829f6d52436e67896a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc4e70b360f988fdbd92300ab22c4613.png)
A.200 | B.270 | C.250 | D.150 |
您最近一年使用:0次
名校
解题方法
4 . 中国古诗词中,有一道“八子分绵”的数学名题:“九百九十六斤绵,赠分八子作盘缠,次第每人多十七,要将第八数来言”题意是:把996斤绵分给8个儿子作盘缠,按照年龄从大到小的顺序依次分绵,年龄小的比年龄大的多17斤绵.那么前3个儿子分到的绵的总数是( )
A.89斤 | B.116斤 | C.189斤 | D.246斤 |
您最近一年使用:0次
2021-03-22更新
|
211次组卷
|
3卷引用:广西来宾市2020-2021学年高二上学期期末数学(文)试题
名校
解题方法
5 . 已知正项等比数列
的前
项和为
,
,且数列
的前
项和为
,若对于一切正整数
都有
,则数列
的公比
的取值范围为( )
![](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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e35f96b93817dc48775639d5f9a418.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aadd9a2715f906b05ad3122c0b2201c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2021-03-22更新
|
397次组卷
|
4卷引用:广西来宾市2020-2021学年高二上学期期末数学(理)试题
6 . 已知数列
中,
,前
项和为
,且点
在直线
上,则
( )
![](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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f6eb42c5715354c8dda12f75a5feca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b979396a703fb14715ba39232f5786a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a189a843e4cf190cf9ee2356712e8412.png)
A.![]() |
B.![]() |
C.![]() |
D.![]() |
您最近一年使用:0次
7 . 在等比数列
中,若
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a2ce5a3c6c8bd0b6b6585ea353d31ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8efa3543be47d0589122a99b585a6373.png)
A.9 | B.1 | C.2 | D.3 |
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8 . 记
为等差数列
的前
项和.已知
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c16b2fc23ec4e8e16f3a26ffbe626f56.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2021-03-22更新
|
279次组卷
|
2卷引用:广西南宁市市直学校2020-2021学年高二上学期期末联考数学(理)试题
解题方法
9 . 在
中,角
所对的边分别为
.若
成等差数列,且
,则
的形状是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fe149b7ceb3dd9adcfe79c176c26bf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.非等边锐角三角形 | B.直角三角形 | C.钝角三角形 | D.等边三角形 |
您最近一年使用:0次
10 . 已知数列
满足
,设
中的最大项为
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fe9a842f5b932deae10c3a73d1dde5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8204e935be0688ce1561d9107b635480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5383c68b875f1647217e7893d36eeed3.png)
A.10 | B.9 | C.11 | D.14 |
您最近一年使用:0次