解题方法
1 .
中,角
所对的边分别为
,已知A、B、C成等差数列,
.
(1)求角B的大小;
(2)求△ABC周长的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38335830b93ac4d99c28a8e209eecb3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f5573b30734d65648f61c0a94c98de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af4cd80d3092f506d6326df7d552eb3b.png)
(1)求角B的大小;
(2)求△ABC周长的取值范围.
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名校
2 . 已知
为等差数列,前n项和为
,若
,则
( )
![](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/81f7ba6e9026f81f5c2cc9ae793c175b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10b0cab25a92b816156d5af0eb2917ae.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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名校
解题方法
3 . 已知数列{an}是首项为
,公差为d的等差数列,前n项和为Sn,满足
,则S9=( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d714abbfd81b8056b8989770774bd2.png)
A.35 | B.40 | C.45 | D.50 |
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2022-02-08更新
|
1908次组卷
|
15卷引用:四川省眉山市仁寿一中南校区2021届高三二模数学(文)试题
四川省眉山市仁寿一中南校区2021届高三二模数学(文)试题四川省仁寿县第一中学2021届高三第二次模拟考试数学 (理)试题江西省上饶市2021届高三高考二模数学(文)试题全国Ⅱ卷决胜高考2021届高三数学(理)仿真卷试题(五)宁夏银川一中2021届高三四模数学(理)试题宁夏银川一中2021届高三四模数学(文)试题黑龙江省哈尔滨市第三中学2021届高三五模数学(理)试题陕西省西安中学2021-2022学年高三上学期期中理科数学试题四川省宜宾市叙州区第一中学校2022-2023学年高三上学期第三学月考试数学(理)试题四川省宜宾市叙州区第一中学校2022-2023学年高三上学期第三学月考试数学(文)试题湖北省荆州中学2021-2022学年高三上学期期末数学试题吉林省通化梅河口市第五中学2021-2022学年高二下学期开学考试数学试题黑龙江省大庆市大庆中学2022届高三第二次模拟数学(理)试题(已下线)高二数学下学期期中精选50题(基础版)-2021-2022学年高二数学下学期考试满分全攻略(人教A版2019选修第二册+第三册)(已下线)艺体生一轮复习 第六章 数列 第26讲 等差数列【讲】
名校
解题方法
4 . 已知数列
的前
项和
,且
满足
,
,若
,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/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68b93bb2c66e49ac3efaf0686d4f3815.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3552c4d6ea5e95c331f7b4c3caa71c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae2e6956e0073cef684fef6a16bead0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a7bf78468ca801ef305ce4f76986da1.png)
A.9 | B.![]() | C.10 | D.![]() |
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2021-11-25更新
|
722次组卷
|
2卷引用:四川省遂宁市2021-2022学年高三上学期零诊考试数学(理科)试题
名校
解题方法
5 . 数列
的前n项和为
,且4,
,
成等差数列.
(1)求数列
的通项公式;
(2)若
,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/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a832ceadef0a271fd4b50289292d85b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5da72309d2507e2f5e5ed88d8cc08963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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2021-11-23更新
|
438次组卷
|
2卷引用:四川省南充高级中学2021-2022学年高二上学期期中考试数学(理)试题
名校
解题方法
6 . 已知数列
的前
项和为
,且
满足
,
,若
,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/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68b93bb2c66e49ac3efaf0686d4f3815.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3552c4d6ea5e95c331f7b4c3caa71c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7110f600351b404b84e6d252d36b4ca5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a7bf78468ca801ef305ce4f76986da1.png)
A.![]() | B.![]() | C.10 | D.![]() |
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2021-11-21更新
|
1530次组卷
|
6卷引用:四川省遂宁市2021-2022学年高三上学期零诊考试文科数学试题
四川省遂宁市2021-2022学年高三上学期零诊考试文科数学试题山东省济宁市邹城市第二中学2021-2022学年高二上学期12月月考数学试题河南省鲁山县第一高级中学2021-2022学年高三上学期12月月考数学(文)试题(已下线)考点24 等差数列、等比数列-备战2022年高考数学典型试题解读与变式(已下线)专题13 数列的性质必刷小题100题-【千题百练】2022年新高考数学高频考点+题型专项千题百练(新高考适用)山东省菏泽市第三中学2022-2023学年高二上学期12月月考数学试题
7 . 已知
为等差数列
的前
项和,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5af1f1b7e9e20d799ee3c06b89a0611c.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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/164afbf55ea7cd7d66158620616e604e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5af1f1b7e9e20d799ee3c06b89a0611c.png)
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2021-10-22更新
|
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2卷引用:四川省成都石室中学2021-2022学年高三上学期10月月考数学(文)试题
名校
8 . 已知
为递增等比数列且
,
,
,
构成等差数列,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/390636a89883bd64bf8da9bf8654aff9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05250f48ac23c7985300ad50202cccb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/821042ef4074b71eff3bd5056b2e92e3.png)
A.![]() ![]() | B.![]() | C.![]() ![]() | D.![]() |
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9 . 已知
,
,
既成等差数列又成等比数列,二次函数
的图像与直线
交于不同两点
,
,则
( )
![](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/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff4d12362d4b8dd25813953e1c5a94b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a3efb79f35db8448f3391252ab7d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df332f01628130c084fd46aaca0a4b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97dad16e4910ec15add074c4077b0e86.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2021-08-06更新
|
229次组卷
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3卷引用:四川省达州市2020-2021学年高一下学期期末数学(文)试题
10 . 已知等比数列
的公比为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
,前
项和为
,
,且
是
与
的等差中项.
(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/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d86abc2064ed9985a5ee3a5b87310991.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/964df3e9308711d7e14fb624b0c25e2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/911278aa8595846abac1972e1de59995.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e86e2e42b4aa93db9241103e7f61766c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a37f1b45e929b42044626edb63681fb.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9d22787faf3cab18b8fa922cc485008.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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次