1 . 数列
的前
项和为
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780019495df34d40fff9d8f31bbf3e74.png)
__________ .
![](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/5bc1dda068b34ce0a8062dd790f03e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780019495df34d40fff9d8f31bbf3e74.png)
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2 . 数列
满足
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ec90d135ea72ac884a8e1415436dcd.png)
_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a5b2d7284d48e2c093a7b57e8e4981.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ec90d135ea72ac884a8e1415436dcd.png)
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解题方法
3 . 已知公差不为零的等差数列
的前
项和为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06f34f1ddb1371d4d1f7366538dde7af.png)
__________
![](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/821b6387c73b238e119117060ef44a0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06f34f1ddb1371d4d1f7366538dde7af.png)
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2023-10-26更新
|
1251次组卷
|
6卷引用:广西壮族自治区玉林市2024届高三高中毕业班第一次摸底测试数学试题
名校
4 . 在等比数列
中,
,
,则公比q是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a316124e688e76d6f330ffbea49d427d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5b38eccdc733944bfe49b24a35b5a4d.png)
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2023-06-17更新
|
627次组卷
|
3卷引用:广西玉林市四校2022-2023学年高二下学期联考质量评价检测数学试题
5 . 设等差数列
的前n项和为
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
______ ,使
为整数的正整数n的值的个数为______ .
![](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/3d5efd820db11512606d98aaa9b1b424.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35f6fef5b0cd6f3ad1a92b1a767452bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5cc400b008302822d916e0a68311ae7.png)
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6 . 已知函数
,若函数
,数列
为等差数列,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aad761466964526abcea35064d68e368.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90930bb1258f4ca110c994153ac5aeb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b1b431e9f127d083f3c474b43711a9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a8d56b56bbe4c70903057c17524fb8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aad761466964526abcea35064d68e368.png)
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解题方法
7 . 记数列
的前n项和为
,已知向量
,
,若
,且
,则
通项为________ .
![](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/1043d57d824b6f102d0f8898743d6128.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a0fc2a3440ca6c8c59a0c5b3a426479.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a53cdfd02f840f55c72dbb4d0607c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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解题方法
8 . 已知正三角形
,某同学从A点开始,用掷骰子的方法移动棋子.规定:①每掷一次骰子,把一枚棋子从三角形的一个顶点移动到另一个顶点.②棋子移动的方向由掷骰子(点数为
)决定,若掷出骰子的点数大于3,则按逆时针方向移动;若掷出骰子的点数不大于3,则按顺时针方向移动.设掷骰子n次时,棋子移动到
处的概率分别为
,
,
.例如:掷骰子一次时,棋子移动到
处的概率分别为
,
.当掷骰子7次时,棋子移动到A处的概率
值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31364ad692afbccf9394d9c507bb7d1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a244cf6ac956323ea14e09c5e175448.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cb0bd2ca3d26328ec2b084b2c125568.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f73c7414b319cc405e24e3ffeba6d193.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93fd65a127fa10f99b47610ccda1e70b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71d6d9da4747ebac1de03ac6cf24067c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81f06a99cb24d7b311fa1907a0ccb4f6.png)
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2023-04-05更新
|
691次组卷
|
2卷引用:广西玉林市博白县中学2022-2023学年高二下学期期中测试数学试题
解题方法
9 . 有穷数列
共有k项,满足
,
,且当
,
时,
,则项数k的最大值为______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dc352f71e67467a7a9d59bb1e0633db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c23ea6a4068336caebba69e44b37cde8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a37a59558292ad6b3d0978bfd7484990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52a35fb9f9ec83262fddde2595c2ddf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28773584ecb753c2bd39dbbcba1ac8ef.png)
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2023-03-26更新
|
659次组卷
|
6卷引用:广西壮族自治区玉林市2023届高三二模数学(理)试题
广西壮族自治区玉林市2023届高三二模数学(理)试题广西2023届高三模拟考试数学(理)试题河南省南阳地区2022-2023学年高二下学期期中热身摸底检测数学试题(已下线)专题10数列(选填)(已下线)第74练 计算提升训练14(已下线)4.3 数列-数列的概念(十二大题型)(分层练习)-2023-2024学年高二数学同步精品课堂(沪教版2020选择性必修第一册)
10 . 设等差数列
的前n项和为
,若
,
,则
的值是__________ .
![](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/71edfe882e48ee0a5adb5613ece498a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/560a3193a0296c96099a49c2bc00ac88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f65fc200f10b97588a0c9896277c9c64.png)
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2023-03-20更新
|
478次组卷
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3卷引用:广西玉林市博白县实验中学2022-2023学年高二下学期5月段考数学模拟题(一)