名校
1 . 已知等差数列
中,
,那么![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2d9b59abf6f45b2795924636b4ef3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1e1afcc848ba6df55d618d81d929513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2d9b59abf6f45b2795924636b4ef3c6.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-05-06更新
|
763次组卷
|
4卷引用:河北省沧州市第一中学2019-2020学年高一下学期3月空中课堂阶段测试数学试题
2019高三·全国·专题练习
名校
2 . 若两个等差数列
,
的前
项和分别为
,
,若对于任意的
都有
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b3ff924681575168ed9b39a36d0ee74.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3388444010f128bd9bd573b9e3f009ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b3ff924681575168ed9b39a36d0ee74.png)
您最近一年使用:0次
2020-04-30更新
|
1288次组卷
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8卷引用:河北省唐山市唐山一中2019-2020学年高一下学期期中数学试题
河北省唐山市唐山一中2019-2020学年高一下学期期中数学试题(已下线)5-2 等差数列及其前n项和(高效训练)-2019版导学教程一轮复习数学(人教版)【区级联考】天津市武清区2019届高三年级(上)第二次月考数学试题云南省玉溪市第一中学2018-2019学年高一下学期期中数学(文)试题云南省玉溪市第一中学2018-2019学年高一下学期期中数学(理)试题安徽省亳州市第二中学2018-2019学年高二上学期期中数学(理)试题(已下线)2.3等差数列的前n项和(2) -2020-2021学年高二 数学课时同步练(人教A版必修5)(已下线)4.2.2 等差数列的前n项和(2)-2020-2021学年高二数学课时同步练(人教A版选择性必修第二册)
名校
解题方法
3 . 在
中,角
,
,
所对的边分别为
,
,
.且满足
.
求证:
,
,
成等差数列;
若
的面积为
,其外接圆半径
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbab80867385719fc122c3d732cb3afb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf6c84731e5e1bd335ecfc2d36c3d81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f53190d6ead827a6338b9de847aeaf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a4f9fb86ea1da4c7f6726bc8fb06c76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d6fc9b90f370fbb27552876b650f8f.png)
您最近一年使用:0次
名校
4 . 已知等差数列
的前
项和为
,若点
,
,
,
满足:①
(
);②
,
,
确定一个平面;③
,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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a47d9b859a3ca077f7fc1a4cdc5b5d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78fbecca12ee62538020483fd55a2109.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abcb8dcde28f83533d198664d53dc616.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06fbdd2e3efbef1ff014df55b242eced.png)
A.29 | B.40 | C.45 | D.50 |
您最近一年使用:0次
2020-04-11更新
|
743次组卷
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8卷引用:2020届河北省保定市高三第一次模拟数学(理)试题
2020届河北省保定市高三第一次模拟数学(理)试题2020届河北省保定市高三第一次模拟数学(文)试题河南省商丘市第一高级中学2019-2020学年高一下学期期末考试数学试题(已下线)调研测试二(A卷 基础过关 检测)-2021年高考数学(文)一轮复习单元滚动双测卷(已下线)专题07 平面向量——2020年高考数学母题题源解密(山东、海南专版)(已下线)调研测试五(A卷 基础过关检测)-2021年高考数学(文)一轮复习单元滚动双测卷内蒙古通辽第五中学2020-2021学年高三第一学期第四次月考文科数学试题(已下线)第七章 数列专练17—数列与向量综合练习(小题)-2022届高三数学一轮复习
解题方法
5 . 设数列
的前n项和
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db83a054c1ef548b19c1217c4fd7f72c.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4300dca231e2f4b37f70900b33439d5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db83a054c1ef548b19c1217c4fd7f72c.png)
您最近一年使用:0次
名校
解题方法
6 . 已知数列
是等差数列,且
,数列
的前n项和为Sn,则S13=_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/894aaec56149f880c7cf2bbc0f358d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76328806ac7ef79fed929d3539b9a463.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/894aaec56149f880c7cf2bbc0f358d2b.png)
您最近一年使用:0次
2020-03-16更新
|
527次组卷
|
5卷引用:河北省冀州中学2018-2019学年高二下学期第二次月考数学(理)试题
7 . 已知数列
的前
项和为
,若
,
,
.则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.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/be29d8f996c54183663d8a954166dc16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2fcd86b9ed6819116a261629f96fae1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/930bc56406e69b785b37a83d48e36724.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dbd9ff686703cad03aa383e5fec21.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-03-04更新
|
806次组卷
|
3卷引用:河北省元氏县第一中学2019-2020学年高一下学期第一次月考数学试题
名校
8 . 已知等比数列
中,
,数列
是等差数列,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/308446a48f8be34cb7a8795df57269bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd9c77ce4d6b6f7c75a8b84b5c3c6c0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff083977477d22ed6bb148353e68b5f4.png)
A.3 | B.6 | C.7 | D.8 |
您最近一年使用:0次
2020-03-04更新
|
1109次组卷
|
10卷引用:河北省保定市博野中学2017-2018学年高一下学期期末数学(理)试题
河北省保定市博野中学2017-2018学年高一下学期期末数学(理)试题河北省保定市博野中学2017-2018学年高一下学期期末数学(文)试题河北省保定市2017-2018学年高一下学期期末调研数学(理)试题河北省保定市2017-2018学年高一下学期期末调研数学(文)试题2020届河北省正中实验中学高三下学期6月模拟数学(理)试题河北省石家庄市第二中学2020-2021学年高二上学期8月线上考试(二)数学试题四川省泸州市泸县第一中学2019-2020学年高一下学期期中考试数学试题四川省棠湖中学2019-2020学年高一下学期期中考试数学试题江苏省镇江市八校联考(镇江中学、扬中高级中学等)2020-2021学年高三上学期12月教学质量检测数学试题湖南省郴州市2020-2021学年高二下学期期末数学试题
9 . 已知奇函数
是定义在
上的增函数,数列
是一个公差为
的等差数列,满足
,则
的值为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a371ccd055d36e9a2d8dde0107ab1b5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5001f1d9f79d46f2f1ee4dbff0fed142.png)
您最近一年使用:0次
2020-01-11更新
|
198次组卷
|
2卷引用:河北省保定市七校2021-2022学年高一下学期7月联考数学试题
10 . 已知等差数列
的前
项和为
,若
,且
, 则满足
的最小正整数
的值为
![](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/6d1383ba6bacac5b2b2c3a277e9edcbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b948d9c83d405945e5d5782429f1711d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49763402b2f2023f0ba64c37924267d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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