2021·全国·模拟预测
名校
1 . 已知
中,内角
,
,
所对的边分别是
,其中
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34831b9a273343bf1ee847d8a63d6ade.png)
.
(1)求
外接圆的面积;
(2)若
,
,
成等差数列,且
,求
的值以及
的面积.
![](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/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34831b9a273343bf1ee847d8a63d6ade.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71f26eac59362ab4175454121037a1e2.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/78b661c79b7b866204fd4084c37bdd4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86bd59e5db199b4133db4ad64aae06bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa1d98c8400450363549b984363085e4.png)
您最近一年使用:0次
2021-05-23更新
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3卷引用:江西省兴国县第三中学2020-2021学年高一(兴特班)下学期第三次月考数学试题
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解题方法
2 . 设递增等比数列
的前
项和为
,已知
,且
,
,
成等差数列.
(1)求数列
的通项公式;
(2)令
,求
.
![](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/4ccdc17b603871d20843ffccca2df0ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7131900393b9906bd6dcfe26ade2059f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/911278aa8595846abac1972e1de59995.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0462c9dc4a0bd08a0ec1cc07f1d2f3e6.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06a1c9153d381d8276809aa13f64c039.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eff65eac3309f11830ef8cb56d660d2a.png)
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2021-03-30更新
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1509次组卷
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5卷引用:江西南昌青山湖区南昌三中雷式学校2020-2021学年高一下学期期中数学试题
江西南昌青山湖区南昌三中雷式学校2020-2021学年高一下学期期中数学试题江苏省扬州市第一中学2020-2021学年高二上学期教学质量调研评估(1)数学试题(已下线)专题31数列求和-2022年(新高考)数学高频考点+重点题型(已下线)6.4 求和方法(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)第四章:数列重点题型复习(2)
名校
3 . 在
中,角A,B,C所对边分别为a,b,c,C为A,B的等差中项,若
且
,则
的面积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb5bac75f36bb1dc5c8190d4dbe681d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b1b3aa790099af9bca94e905cef5b8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.![]() | B.2 | C.![]() | D.![]() |
您最近一年使用:0次
2020-02-20更新
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245次组卷
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2卷引用:贵州省贵阳市民族中学2020-2021学年高一下学期第一次月考数学试题