解题方法
1 . 已知数列
满足
,且其前
项和为公比为2的等比数列.则
的前
项积是__________ .(用含
的式子表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86fc336b4a83bf6d66c4afcc431597f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.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/b6a24198bd04c29321ae5dc5a28fe421.png)
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解题方法
2 . 传说古希腊毕达哥拉斯学派的数学家用沙粒和小石子来研究数,他们根据沙粒或小石子所排列的形状把数分成许多类,如图中第一行的1,3,6,10称为三角形数,第二行的1,4,9,16称为正方形数.下列数中,既是三角形数又是正方形数的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/23/a632d19a-a81f-4a89-a1d2-bc8bf8655918.png?resizew=284)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/23/a632d19a-a81f-4a89-a1d2-bc8bf8655918.png?resizew=284)
A.36 | B.289 | C.1225 | D.1378 |
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名校
解题方法
3 . 已知
是各项为整数的递增数列,且
,若
,则
的最大值为____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6259e837ae77af00fa394a87a6e6436.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6787b17c43570dd2098d3ec732fdd838.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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2023-01-19更新
|
732次组卷
|
2卷引用:浙江省杭州第二中学2022-2023学年高三下学期统测模拟(开学考试)数学试题
解题方法
4 . 已知数列
为公差不为0的等差数列,且
成等比数列.
(1)求数列
的通项公式;
(2)设
为数列
的前
项和,令
,求数列
的前2022项和.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7248e936fceac055490b5ed9b5d4cdc4.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.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/07035078c627986d2a9a55599e3813f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
您最近一年使用:0次
5 . 已知数列
的前n项和为
,数列
为等差数列,且满足
.
(1)求数列
和
的通项公式;
(2)若
,求数列
的前
项和
.
![](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/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fee25643b5f6700a02a2049ee519f9d4.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
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0116c7e33285ad483ca8fb1b6c46d058.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d51f9147b8265c0276c1f2c2659197.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbd85b79372dc6e596d465f738c3c300.png)
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2022-05-21更新
|
3040次组卷
|
6卷引用:浙江省名校协作体2022-2023学年高三下学期开学联考适应性考试数学试题
6 . 我国古代数学家已经会借助三角数表来计算二阶等差数列的和,例如计算
,把第一个数表逆时针旋转两次,得到后两个数表,再把3个数表叠在一起,每一个位置的和都是5,所以
,我们使用类似的想法计算:
,三个数表叠加之后每一个位置的和都是___________ ;推广可得
的求和公式![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e693f4b9a748e16cd056dc4f7f4b5883.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e27c433a8927423367301f00bacc67f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2f4311114c10797c2542a704169b99e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf94e44913ccf83e64b3691d6ed2e1a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
![](https://img.xkw.com/dksih/QBM/2022/2/25/2924032459104256/2925413285724160/STEM/0a97116d-59cf-4147-ba46-f3046ebeca38.png?resizew=367)
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2022-02-27更新
|
632次组卷
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4卷引用:浙江省名校协作体2022届高三下学期开学考数学试题
浙江省名校协作体2022届高三下学期开学考数学试题浙江省名校协作体2022届高三下学期3月联考数学试题(已下线)临考押题卷06-2022年高考数学临考押题卷(新高考卷)陕西省2022届高三下学期高考预测理科数学试题
7 . 已知等差数列
的前
项和是
,公差
不为零,若
,
,
,成等比数列,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/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5da4cd81500bdb43118150dbdb1541e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc858b7a95c5006a44067022da09f667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b53c211eecfe7c449b52ace8aef55d58.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
8 . 已知等比数列
的前n项和为
,
,
.
(1)求数列
的通项公式;
(2)在
与
之间插入n个数,使这
个数组成一个等差数列,记插入的这n个数之和为
,求数列
的前n项和.
![](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/d1cc5ddb7af48495502625cc0655c375.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/090426eb29836bc30c006b3739c08057.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3468a665ac713ab7b400c672f19650a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de777c4e44546bcfe26ad5b6bb418052.png)
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2022-02-13更新
|
350次组卷
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3卷引用:浙江省温州市瑞安市第六中学2021-2022学年高二下学期入学检测数学试题 .
浙江省温州市瑞安市第六中学2021-2022学年高二下学期入学检测数学试题 .山东省菏泽市2021-2022学年高二上学期期末数学试题(已下线)第03讲 等比数列(核心考点讲与练)-2021-2022学年高二数学考试满分全攻略(人教A版2019选修第二册+第三册)
名校
9 . 已知等差数列
的前
项和为
,若
,
,下列结论正确的是( )
![](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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e50941c44c2701f041500a3bf4bab1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b134439819d3069da709979cb9b1a991.png)
A.数列![]() | B.![]() |
C.当![]() ![]() | D.![]() |
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2022-02-05更新
|
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4卷引用:浙江省金华市外国语学校2021-2022学年高二下学期期初素养测试数学试题
浙江省金华市外国语学校2021-2022学年高二下学期期初素养测试数学试题安徽省皖西七校2021-2022学年高二上学期期末联考数学试题(已下线)专题6-1 等差数列,等比数列中性质应用(选填)-1湖南省岳阳市岳阳县2023届高三下学期新高考适应性测试数学试题
名校
10 . 为增强广大师生生态文明意识,大力推进国家森林城市建设创建进程,某班26名同学在一段直线公路一侧植树,每人植一棵(各自挖坑种植),相邻两棵树相距均为10米,在同学们挖坑期间,运到的树苗集中放置在了某一树坑旁边,然后每位同学挖好自己的树坑后,均从各自树坑出发去领取树苗.记26位同学领取树苗往返所走的路程总和为
,则
的最小值为______ 米.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
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2022-01-23更新
|
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3卷引用:浙江省温州市瑞安中学2021-2022学年高二下学期期初测试数学试题