名校
解题方法
1 . 在△ABC中,角A,B,C的对边分别为a,b,c,已知
.
(1)证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab29f045e046a3698624d6cf19de7e6f.png)
(2)若
,
,求△ABC的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b626c78057d7e0a8704f147e1ebf3c2.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab29f045e046a3698624d6cf19de7e6f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e899c486dc49e560fc4aca05e16835b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7fa79a550591eb9e1bd07bced3a08fc.png)
您最近一年使用:0次
2023-04-30更新
|
2277次组卷
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14卷引用:四川省资阳市2023届高考适应性考试数学(理科)试题
四川省资阳市2023届高考适应性考试数学(理科)试题四川省资阳市2023届高考适应性考试数学(文科)试题贵州省2023届高三下学期联合考试数学(理)试题辽宁省辽阳市2023届高三二模数学试题(已下线)专题1 平面向量(3)江苏省盐城市五校2022-2023学年高一下学期5月联考数学试题(已下线)专题2 平面向量(2)(已下线)模块一 专题3 解三角形(苏教版)云南省楚雄彝族自治州民族中学2022-2023学年高二下学期6月月考数学试题广东省深圳市南方科技大学附属中学2022-2023学年高二下学期期中数学试题(已下线)专题08 解三角形-1四川省泸县第一中学2023-2024学年高三上学期10月月考数学(文)试题四川省泸县第一中学2023-2024学年高三上学期10月月考数学(理)试题(已下线)模块一 专题4 三角函数与解三角形(人教A)3
解题方法
2 . 记△ABC的内角A,B,C的对边分别为
,
,
,已知![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7835f94169920faf8e04c623f41441ee.png)
.
(1)证明:
;
(2)若
,
,求△ABC的面积.
![](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/7835f94169920faf8e04c623f41441ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d6c3e00a78921faf110ffb26d93bb2c.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02746ec8e4220d8b4a174d5e9a711ed2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80fafa5beb70c80533bb17b31fb5416f.png)
您最近一年使用:0次
名校
解题方法
3 . 《几何原本》卷2的几何代数法(以几何方法研究代数问题)成了后世西方数学家处理问题的重要依据,通过这一原理,很多的代数的公理或定理都能够通过图形实现证明,也称之为无字证明.现有如图所示图形,点
在半圆
上,点
在直径
上,且
,设
,
,则该图形可以完成的无字证明为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/4/25ef9fba-2f8c-4c57-acfa-e1fea83eeae7.png?resizew=147)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ebef5bab02280cdc99cc7f689135cd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3d296e0d7154a170cb7d3ae42989b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4a88b719166fcc1431f876bc8c5656c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/4/25ef9fba-2f8c-4c57-acfa-e1fea83eeae7.png?resizew=147)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2023-04-29更新
|
2163次组卷
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15卷引用:四川省绵阳博美实验高级中学2022-2023学年高一下学期开学考试数学试题
四川省绵阳博美实验高级中学2022-2023学年高一下学期开学考试数学试题(已下线)专题04 基本不等式及其应用-1(已下线)第五节 基本不等式 A素养养成卷广西北部湾经济区2023届高三一模数学(文)试题辽宁省六校协作体2022-2023学年高二下学期6月联合考试数学试题(已下线)2.2 基本不等式精讲-【题型分类归纳】(已下线)3.2 基本不等式(6大题型)-【题型分类归纳】(苏教版2019必修第一册)(已下线)3.2 基本不等式(1)-【帮课堂】(苏教版2019必修第一册)(已下线)第二章 等式与不等式(知识梳理+热考题型)(2)-高一数学同步精品课堂(人教B版2019必修第一册)湖南省郴州市嘉禾县第六中学2023-2024学年高一上学期第一次月考数学试题安徽省淮南市兴学教育2023-2024学年高一上学期阶段综合测数学试卷(已下线)第01讲 基本不等式(练透8大重点题型)-【练透核心考点】(已下线)第2章 等式与不等式-【高中数学课堂】单元测试基础卷(人教B版2019)安徽省合肥市肥东县综合高中2022-2023学年高三上学期11月期中考试数学试题(已下线)第2章 一元二次函数、方程和不等式(基础、典型、易错、新文化、压轴)分类专项训练-2022-2023学年高一数学考试满分全攻略(人教A版2019必修第一册)
4 . 已知数列
和
满足
.
(1)证明:
和
都是等比数列;
(2)求
的前
项和
.
![](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/2e2858c0b4c46dce5ba00a07dfe4c118.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5344eadd4711db34e3f935aedd5fb270.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ec12a9a60f82467bf7bf834a9a9b1f7.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec4bdc2a6d4fc387dc621f0b5a268c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
您最近一年使用:0次
5 . 记
的内角
、
、
的对边分别为
、
、
,已知
.
(1)证明:
;
(2)若
,
,角
的内角平分线与边
交于点
,求
的长.
![](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/157d2f0f0db718649f148134436c3a43.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/428d8ba5d74557ac0660343e61b3bd8f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9597cc64469c379d47dfc6b3f27feee7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
您最近一年使用:0次
2023-04-07更新
|
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3卷引用:东北三省三校(哈师大附中、东北师大附中、辽宁省实验中学)2023届高三二模数学试题
名校
解题方法
6 . 设数列
前n项和
满足
,
.
(1)证明:数列
为等比数列;
(2)记
,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/b44373aed58d21a7d047cb72e4c1b2eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00a722ed882b4a98bb05fc533e3244ac.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66b1d1e6cbccc6241a872d24d6449aae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1156517dc5ccfb484bf078857ad5cca7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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2023-04-19更新
|
2699次组卷
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6卷引用:湖北省2023届高三下学期四月调研考试数学试题
湖北省2023届高三下学期四月调研考试数学试题(已下线)押新高考第18题 数列综合专题13数列(解答题)(已下线)福建省百校联考2023-2024学年高三上学期期中考试数学试题湖北省荆州市松滋市第一中学2024届高三上学期12月月考模拟数学试题(二)广东省肇庆市肇庆中学2023届高三下学期强化训练模考五数学试题
7 . 记
为数列
的前
项和,已知
,
.
(1)求{an}的通项公式;
(2)证明:
.
![](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/f6065aaa8f3f103d1bc960da8318ce35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f147fa2842b4d299c92c6e5b77d1825.png)
(1)求{an}的通项公式;
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ea26da6eee15ebfe767efca0c09f08e.png)
您最近一年使用:0次
8 . 已知数列
满足
,
.
(1)求
的通项公式;
(2)若
,设数列
的前n项和
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29c23903cea28d6994921e6a68852179.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6574b44a3f8e46d987efd602f98ada93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec4bdc2a6d4fc387dc621f0b5a268c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6c35e4abba5ffaebefbb1b1dfe038aa.png)
您最近一年使用:0次
2023-03-26更新
|
1628次组卷
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3卷引用:九师联盟(安徽省)2023届高三下学期3月联考数学试题
解题方法
9 . 已知
中,角
,
,
的对边长分别是
,
,
,
,且
.
(1)证明:
;
(2)若
,求
外接圆的面积
![](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/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/8d5a611bebe78ba33770aec0fe46786a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6de1d395e6c48c0676a1488a299479d9.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3af83b4173f604bb5971b1597f9f01a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6129fbf40a950fc8c516f0abaab21957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
10 . 数列
中,
,
.
(1)求证:数列
是等比数列;
(2)若
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3369ae2337f8d6a049fd8e5a9f313f87.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c895d4ce5ce82ef9b311b9369b4de11.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f1179414a71459a3cfa134ace94302e.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
2023-02-03更新
|
1732次组卷
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3卷引用:广东省惠州市2023届高三第三次调研数学试题