11-12高二上·辽宁营口·期末
名校
1 . 在
中,角
的对边分别为
,
且
.
(1)求角
的大小;
(2)若
,求
的面积
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9178fc8b5d65aa75fa9196294a0db7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3470f8e8142a61cfd3d4aa1e1e203d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a5d3cb8d09449215d61149940c2138a.png)
且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/672d448e4ba92685d11cfec5985effad.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b482f10fcaa4dfa4429a074c526a772b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9178fc8b5d65aa75fa9196294a0db7e.png)
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2016-12-01更新
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1149次组卷
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6卷引用:2011年山东省潍坊市三县高二上学期模块学分认定检测数学
(已下线)2011年山东省潍坊市三县高二上学期模块学分认定检测数学(已下线)2010—2011学年辽宁省营口市普通高中高二上学期期末教学质量检测理科数学(已下线)2011-2012学年辽宁省庄河市第六高级中学高二开学初考试理科数学试卷山西省大同市2018-2019学年高一下学期期末数学试题人教B版(2019) 必修第四册 过关斩将 第九章 解三角形 9.1.2 余弦定理山西省朔州市应县第一中学校2019-2020学年高一下学期期中数学(文)试题
2011高二上·山东潍坊·学业考试
解题方法
2 . 已知点(1,2)是函数
的图象上一点,数列
的前
项和
.
(Ⅰ)求数列
的通项公式;
(Ⅱ)若
,求数列
的前
项和
.
![](https://img.xkw.com/dksih/QBM/2012/10/24/1571032771551232/1571032777211904/STEM/48180b0b5b6d48199c0ddcb24fef7656.png)
![](https://img.xkw.com/dksih/QBM/2012/10/24/1571032771551232/1571032777211904/STEM/bf73c84af8de4f08bf80eb19ac278f68.png)
![](https://img.xkw.com/dksih/QBM/2012/10/24/1571032771551232/1571032777211904/STEM/b693fecf06a547698297c7c1f3ec4c88.png)
![](https://img.xkw.com/dksih/QBM/2012/10/24/1571032771551232/1571032777211904/STEM/feab03c972d242399a33e7e4cd226830.png)
(Ⅰ)求数列
![](https://img.xkw.com/dksih/QBM/2012/10/24/1571032771551232/1571032777211904/STEM/bf73c84af8de4f08bf80eb19ac278f68.png)
(Ⅱ)若
![](https://img.xkw.com/dksih/QBM/2012/10/24/1571032771551232/1571032777211904/STEM/4a84dd1a04b6409f98b9da28768e287f.png)
![](https://img.xkw.com/dksih/QBM/2012/10/24/1571032771551232/1571032777211904/STEM/65e951c15fd24613b77d68c545389965.png)
![](https://img.xkw.com/dksih/QBM/2012/10/24/1571032771551232/1571032777211904/STEM/b693fecf06a547698297c7c1f3ec4c88.png)
![](https://img.xkw.com/dksih/QBM/2012/10/24/1571032771551232/1571032777211904/STEM/4b045758a8724e83911869913764f002.png)
您最近一年使用:0次
2011高二上·山东潍坊·学业考试
3 . 如图,海中小岛
周围
海里内有暗礁,一船正在向南航行,在
处测得小岛
在船的南偏东30°,航行
海里后,在
处测得小岛在船的南偏东
,如果此船不改变航向,继续向南航行,问有无触礁的危险?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b72ac611ae66b86761e080761d9aabc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b53c7539ed297ea63b9ace6f5cc58ca8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e5fa72f2878b476bc57f0df12d6555.png)
![](https://img.xkw.com/dksih/QBM/2011/11/17/1570353348812800/1570353354039296/STEM/80be61b4-8c37-43e5-b5dd-fd4af76f2764.png?resizew=168)
您最近一年使用:0次
2011高二上·山东潍坊·学业考试
解题方法
4 . 在
中,角
的对边分别是
,已知
,则
的形状是 三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a096c344e0753dfb3c8ef36a46824b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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2011高二上·山东潍坊·学业考试
5 . 已知数列
中,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a2f81c76c1ba079821a2d12dbcd3bf8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45bcd8f6ede8cc2513ad41402f40086.png)
(1)证明数列
是等比数列,并求出数列
的通项公式;
(2)记
,数列
的前
项和为
,求使
的
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a2f81c76c1ba079821a2d12dbcd3bf8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45bcd8f6ede8cc2513ad41402f40086.png)
(1)证明数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d82c65a855b1eed9c43e6829f6c3bffb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e27538e3619ab75f05ce67d1263c8fac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.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/f3df1940d36a24d730855c5683e8c314.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次