23-24高二上·全国·课后作业
1 . 已知直角三角形的三边成等差数列,求证:三边之比为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d44d5798d856568f7f6e5e91269ad5.png)
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2 . 一个梯形两底边长分别为12cm和22cm,将梯形一腰10等分,过每一分点作平行于梯形底边的直线,求这些直线夹在梯形两腰间的线段的长度之和.
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23-24高二上·全国·课后作业
3 . 已知等差数列
的前n项和为
,从结构特征看
有何数学含义?数列
是等差数列吗?
![](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/f70a4bb28e0e355663bdd5b7f4a1f7b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dea1dd4ffcb4cf0697ca43079f6a1f2.png)
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23-24高二上·全国·课后作业
解题方法
4 . 《张丘建算经》有如下问题:今有女善织,日益功疾.初日织五尺,今一月日织九匹三丈.问日益几何?其意思是:有一位女子很会织布,一天比一天织得快,而且每天增加的长度都是一样的.已知第一天织5尺,经过一个月(30天)后,共织布9匹3丈.问每天多织布多少尺?(注:1匹=4丈,1丈=10尺.)
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23-24高二上·全国·课后作业
解题方法
5 . 已知等差数列
的公差
,且
,求它的前100项之和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ec5092048ae59b74623c4be1048c8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d95f4b50943fc95f5e39008ab3857420.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08c9965a04c2a6de04e949a15762f372.png)
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23-24高二上·全国·课后作业
6 . 已知数列
为等差数列,前n项和为
,求解下列问题:
(1)若
,
,求
;
(2)若
,
,求
;
(3)若
,
,
,求n.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1185922d4202f89c876b85824057c5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36989853e0d247e504b292e17d8a8cfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaadfdfb23ba4a00669da7eccb334862.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6a5241b0b0c4a9ffa9ce68c38d821bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89ae52a8f33b38d4c4a81993d704d7b8.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/122931f239d21bbe91a696073c79716f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26ef06b8ea6bbf164ba71f3232601656.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/532a1816979013b23d7657be71e0be90.png)
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23-24高二上·全国·课后作业
7 . 在数列
中,
,
,通项公式
,其中p,q为常数,
.
(1)求
的通项公式;
(2)88是否是数列
中的项?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04fee32b9b992f3e70535f91c60b3d30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15ff304e5b435692165825f0a6d8448e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81fbdf49cd00af1ff87259836ddd9f6b.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)88是否是数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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2023-09-12更新
|
574次组卷
|
8卷引用:1.2 等差数列
(已下线)1.2 等差数列湘教版(2019)选择性必修第一册课本习题 习题1.2(已下线)专题02 求数列的通项的八种方法(八大题型)-2023-2024学年高二数学《重难点题型·高分突破》(人教A版2019选择性必修第二册)(已下线)4.1 数列(1)(已下线)专题04 数列(1)(已下线)5.1.1 数列的概念(3知识点+6题型+强化训练)-【帮课堂】2023-2024学年高二数学同步学与练(人教B版2019选择性必修第三册)(已下线)第01讲 4.1数列的概念(1)(已下线)4.1 数列的概念——课后作业(提升版)
23-24高二上·全国·课后作业
8 . 在等差数列
中,
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fa4cf1aefcb569197b97ecb8fc4049f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad2da0ff9dc73d62f8162fc3de186150.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e76d1d8e50dda4d50229a8a20c57e58.png)
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23-24高二上·全国·课后作业
9 . 已知等差数列
,
是小于
的正整数,
是
和
的等差中项吗?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ab5b3fb212ed2113ff5410a40068cbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4624141790a9fddfb8be85592ccf3e1f.png)
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23-24高二上·全国·课后作业
10 . 在等差数列
中,
(1)已知
,
,求
;
(2)已知
,
,求d;
(3)已知
,
,
,求n.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbe7bdaaf8b0adf10bf2ef6c1255b1dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f2572192cc7ca046e9a3155ef3e56a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e35eeaabd951fb09b2926807da3685b.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0748c346ed88f98e424de8edf278325.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec86e0dce142fe6fb91d2ab687a3b0e4.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f2572192cc7ca046e9a3155ef3e56a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6c2130a7cbbcd1554f4863e1666408d.png)
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