名校
1 . 在
中,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b63868b35575edd41af10f96466b543.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16ca90e8a784f990c4097eec9219908d.png)
A.4 | B.![]() | C.3 | D.![]() |
您最近一年使用:0次
2024-04-13更新
|
549次组卷
|
4卷引用:广西钦州市2023-2024学年高一下学期期中考试数学试卷
广西钦州市2023-2024学年高一下学期期中考试数学试卷黑龙江省绥化市绥棱县第一中学2023-2024学年高一下学期4月月考数学试题黑龙江省九校联盟(齐齐哈尔五校+黑河四校 )2023-2024学年高一下学期4月期中联合考试数学试题(已下线)高一下学期第三次月考模拟卷(新题型)--同步题型分类归纳讲与练(人教A版2019必修第二册)
名校
解题方法
2 . 已知正项数列
,满足
.
(1)求
;
(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/b61cc942eaa2c2d9f47608ddfcdd716c.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/216876de04325fd250c38c485cbc34b7.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
2024-04-10更新
|
583次组卷
|
2卷引用:广西钦州市2023-2024学年高二下学期期中考试数学试卷
名校
解题方法
3 . 已知
的内角A,B,C的对边分别为a,b,c,且
.
(1)求角
的大小;
(2)若
的面积为
,
,求
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c67027222599a70a0cb26cedb297f039.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14fc6d812e0f2a7ff2b7bb4f4c92369d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f704179f68ce7fb0ccea3d5e36282ffd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
2024-04-10更新
|
888次组卷
|
4卷引用:广西钦州市2023-2024学年高一下学期期中考试数学试卷
2012·广西南宁·一模
名校
解题方法
4 . 已知在
中,角
所对的边分别为
,且
.
(1)求角
的大小;
(2)设向量
,求当
取最大值时,
的值.
![](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/070c6df3ba0a2d6e2ccc4175c5ac0288.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)设向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09b6b3c9db16d966d6acfa10dd1d4815.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f643616cd3d2459c506c8647641f081f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/354f86b608c5fa3641aff877665a992f.png)
您最近一年使用:0次
2024-04-08更新
|
893次组卷
|
5卷引用:2012届广西南宁二中高三3月模拟考试理科数学试卷
(已下线)2012届广西南宁二中高三3月模拟考试理科数学试卷(已下线)2013届辽宁省营口开发区一高中高三入学摸底考试理科数学试卷江苏省无锡一中2019-2020学年高三上学期10月月考数学试题湖南省岳阳市岳阳县2024届高三下学期开学考试数学试题宁夏吴忠市青铜峡市宁朔中学2023-2024学年高一下学期3月月考数学试题
2024·全国·模拟预测
名校
解题方法
5 . 在
中,角
所对的边分别为
,且满足
.
(1)求角
;
(2)若点
在线段
上,且满足
,求
面积的最大值.
![](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/eb2a079cb0c1ba0322f3b20b74b64bdc.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89d0bf5c85f11d5c90d64c9a5a4724f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
2024-04-07更新
|
1718次组卷
|
5卷引用:广西南宁市第二中学·柳州高级中学2023-2024学年高二下学期5月联考数学试题
广西南宁市第二中学·柳州高级中学2023-2024学年高二下学期5月联考数学试题(已下线)高三数学临考冲刺原创卷(五)吉林省白城市洮南市第一中学2023-2024学年高一下学期4月阶段性考试数学试题河南省新乡市封丘县第一中学2023-2024学年高一下学期4月阶段性考试数学试题(已下线)专题06 解三角形综合大题归类(2) -期末考点大串讲(苏教版(2019))
名校
解题方法
6 . 在
中,
分别是角
的对边,且满足
.
(1)求角
的大小;
(2)若
为
的中点且
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b041299d8a297daa0dc50b352c36659f.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f6b15e5281438df0fd041edb6af54cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5e68edcc956f523102e8ed94b1aa98a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
2024-04-07更新
|
1127次组卷
|
3卷引用:广西南宁市第三中学2023-2024学年高一下学期月考(二)数学试题
7 . 记等差数列
的前n项和为
,若
,
.
(1)求
的通项公式;
(2)求使
成立的n的取值集合.
![](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/31e832e2bca9c4c6e5c1cb6ee0e34d7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d0a11dd1b3ee8e45f1f2307e2d66cc4.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)求使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d609962c29b6820e5eacca220947258.png)
您最近一年使用:0次
解题方法
8 . 等差数列
中,
为
的前n项和,
,若不等式
,对任意的
恒成立,则实数k的取值范围为( )
![](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/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da9166f4cb7811b893e0a435118c2c95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a651fd41462de3f9c6edbead15738580.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
9 . 在
中,D为边
上一点,满足
,且
.
(1)证明:
.
(2)若
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44399bddd012b809ae5f95518c9bee28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf69ba0c29cab6f013e61c5eb3a87942.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7749006d7e99bbec95b12e044bf8f87b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32f5434406acfefc5690608f18a7e02d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5cb63aeea0b37799404c8fec092b21d.png)
您最近一年使用:0次
名校
10 . 如图,在平面四边形
中,
.
时,求四边形
的对角线
和
的长度;
(2)设
,记四边形
的面积为
,求的表达式,并求出它的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/154fc1608b93d455ce9624dbad8abb02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a16dc02090b6e9263555061f14fbc8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e062b576227465b4512dd653c3f16d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58e1d3f78a802596b825166767ceee40.png)
您最近一年使用:0次