名校
解题方法
1 . 已知
为等差数列
的前
项和,若
,
,则使
的
的最大值为( )
![](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/9594106a4525f7faa16931cd5225f184.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9b6d2d966e2225029401e5732e57a20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49763402b2f2023f0ba64c37924267d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
A.7 | B.9 | C.16 | D.18 |
您最近一年使用:0次
2023-04-04更新
|
671次组卷
|
5卷引用:新疆乌鲁木齐市第四中学2022-2023学年高二上学期期中阶段诊断测试数学试题
2 . 已知数列
的前
项和为
,且满足
.
(1)求数列
的通项公式;
(2)设
=
,求数列
的前
项和
.
![](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/2814be664a8e81cdbf87e24c11eb985d.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd88cb8d1805644b57f72a6af4e054c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dc0bdefe6ea4cc508dd42ee6061106b.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
2023-04-01更新
|
945次组卷
|
3卷引用:新疆乌鲁木齐市第四中学2022-2023学年高二上学期期中阶段诊断测试数学试题
名校
解题方法
3 . 如图所示,直三棱柱
中,
分别是
的中点,
,则
与
所成角的余弦值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20863ff89ed7a64e2de1d492ff7deff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dbfdc4d5bee7fa22a927d05d6775015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebb0bc9dca69c84a5ebc6c335b02c6af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-09-11更新
|
1330次组卷
|
22卷引用:新疆昌吉州2021-2022学年高二上学期期末考试数学(理)试题
新疆昌吉州2021-2022学年高二上学期期末考试数学(理)试题(已下线)7.4 几何法解空间角(精练)-【一隅三反】2022年高考数学一轮复习(新高考地区专用)(已下线)专题05 立体几何体-备战2022年高考数学(理)母题题源解密(全国乙卷)黑龙江省哈尔滨市哈尔滨师范大学附属中学2021-2022学年高一下学期期末数学试题(已下线)第02讲 空间点、直线、平面之间的位置关系(练)河北省邯郸市大名县第一中学2023届高三上学期第一次月考数学试题(已下线)第02讲 空间点、直线、平面之间的位置关系 (高频考点—精讲)(已下线)第八章 立体几何初步 讲核心 02四川省眉山第一中学2022-2023学年高二下学期开学测试文科数学试题广东省东莞市东莞市东华高级中学2023-2024学年高二上学期开学考试数学试题湖北省咸宁市赤壁市第一中学2023-2024学年高二上学期9月月考数学试题四川省乐山市金口河区延风中学2023-2024学年高二上学期9月月考数学试题四川省成都市金牛区实外高级中学有限公司2023-2024学年高二上学期第一阶段考数学试题四川省成都市金牛区实外高级中学2023-2024学年高二上学期10月月考数学试题四川省成都市郫都区第四中学2023-2024学年高二上学期10月月考数学试题百师联盟全国卷2021届高三开年摸底联考数学(理)试题(已下线)9.4 空间角与空间距离(已下线)模块五 空间向量与立体几何-2(已下线)高一下学期期末考点大通关真题精选100题(2)-期中期末考点大串讲(已下线)专题10 空间点、直线、平面之间的位置关系-【寒假自学课】(人教A版2019)(已下线)8.6.1直线与直线垂直+8.6.2直线与平面垂直——课后作业(基础版)(已下线)第11章:立体几何初步章末重点题型复习(2)-【帮课堂】(人教B版2019必修第四册)
名校
解题方法
4 . 记
为等差数列
的前
项和,已知
.
(1)求
的公差
;
(2)求
的最大值.
![](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/a39d1550c2039b855042409d813651bd.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
您最近一年使用:0次
2023-02-21更新
|
549次组卷
|
2卷引用:新疆喀什地区疏附县第一中学2022-2023学年高二上学期期末考试数学试题
5 . 已知等差数列
中,
,
.
(1)求
的通项公式;
(2)求
的前n项和
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1897bbbfe7f28fb77974173b3472b1fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b08031affbac09b6c2fe638065e6176.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
您最近一年使用:0次
名校
解题方法
6 . 已知数列
的前
项和为
,且
.数列
是等比数列,
,
.
(1)求
,
的通项公式;
(2)求数列
的前
项和
.
![](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/944777f50704d7faf7a7d1fff013b4f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59dd6c97d2ee3e74ba5730f1cbcc1d43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/364f8ccb16e0dd0873291c9f351d6ffb.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea39b0504526aeef83ef3a2cb165d673.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
名校
7 . 已知公差为d的等差数列{an}中,
,
,其前n项和为Sn,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f21c9c920ec8bc13650e9b2f455290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8421f1d211ce6c347edf098c18e51f26.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
解题方法
8 . 设
是等差数列
的前n项和,
,则
等于( )
![](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/b41d03ecbf0d6dbc038cbbf1c292f470.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/821f36383af3de41ab2115d85e33cb59.png)
A.1 | B.-1 | C.2 | D.![]() |
您最近一年使用:0次
名校
解题方法
9 . 已知等差数列
为递增数列,
为数列
的前n项和,
,
.
(1)求
的通项公式;
(2)若数列
满足
,求
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/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87df5b0496138ac64f85536a60d6c7e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/751859e4f0b1cb2c94fd5cca373de9af.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/ccccf5e820f4d7dc951a6306f5929915.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
10 . 已知数列
首项
.
(1)求
的通项公式;
(2)令
,数列
的前n项和为
,计算
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/838c620da246f4e0e2eddbb81bc650b7.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f82ecbca314a76a2cc7ba40066813296.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/08eb71ecf8d733b6932f4680874dbbf3.png)
您最近一年使用:0次