1 . 在
中,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d0930bbb33a99808f5d00504cc73f0.png)
(1)求
;
(2)再从条件①、条件②、这两个条件中选择一个作为已知,使
存在且唯一确定,并求
边上中线的长.
条件①:
的面积为
;
条件②:
的周长为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc7fe712e3108e3597bd8f5669474687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d0930bbb33a99808f5d00504cc73f0.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
(2)再从条件①、条件②、这两个条件中选择一个作为已知,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
条件①:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2ca820a456491348e72587e4fe10bc6.png)
条件②:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb8fb6f3d7540831a9e97d3b184a491.png)
您最近一年使用:0次
2023-07-09更新
|
276次组卷
|
7卷引用:吉林省延边州2023届高三统考二模数学试题
吉林省延边州2023届高三统考二模数学试题2024届高三第一次统一考试(全国乙卷)理科数学试题贵州省黔南州2023届高三上学期质量监测数学(文)试题(已下线)专题12 押全国卷第17题 解三角形(已下线)专题04 三角函数-2江西省宜春市宜春一中、万载中学、宜丰中学2022-2023学年高二下学期期末考试数学试题江西省宜春市第一中学2022-2023学年高二下学期期末考试数学试题
名校
解题方法
2 . 抚松县第一中学全体师生为庆祝2023年高考圆梦成功,选定大方鼎雕塑为吉祥物,为高考鼎立助威.若在
处分别测得雕塑最高点的仰角为
和
,且
,则该雕塑的高度约为( )(参考数据
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab609a6574633ebabcff3e73fa862081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac09dc1ca2cdd7aef28c218763d3e4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5328421f88e455d62909e5166122633.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7788830ed1cb3b9c5988f70f43595f2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c78cd7b9447577b1a6898dbfc2ee5f4e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/28/d9dd4e37-add7-47a4-88b0-933989374252.png?resizew=162)
A.4.93 | B.5.076 | C.6.693 | D.7.177 |
您最近一年使用:0次
3 . 已知数列
满足
.
(1)求
的通项公式;
(2)已知
,
,求数列
的前20项和.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab5227c1cc92b6d8f086bc561d67c2d5.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f050936d05797611842b256d544c5dd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b08c58baacec3cd0c0a06e267fa9ec5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
您最近一年使用:0次
2023-06-17更新
|
1361次组卷
|
11卷引用:吉林省白山市2023届高三三模联考数学试题
吉林省白山市2023届高三三模联考数学试题河南省焦作市2022-2023学年高三第二次模拟考试数学(理科)试题陕西省咸阳市高新一中2023届高三下学期第八次质量检测理科数学试题陕西省咸阳市高新一中2023届高三下学期第八次质量检测文科数学试题河南省焦作市2022-2023学年高三第二次模拟考试数学(文科)试题湖南省岳阳市岳阳县2023届高三下学期新高考适应性测试数学试题辽宁省锦州市黑山县黑山中学2023届高三一模数学试题湖南省部分市2023届高三下学期3月大联考数学试题河北省保定市安国中学等3校2023届高三下学期3月月考数学试题辽宁省沈阳市第二十中学2023-2024学年高三上学期第一次模拟考试数学试题(已下线)第04讲 数列的通项公式(十六大题型)(讲义)-2
名校
4 . 已知锐角
的内角
的对边分别为
,且
.
(1)求
;
(2)若
,角
的平分线交
于点
,
,求
的面积.
![](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/cc576d99342ed127f97c28da230025d6.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5af039cad52ca4e1f1e322277bc81afd.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/dfb08f6a798dc293f3d8de281190f65e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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名校
解题方法
5 . 已知
为正项等差数列,
为正项等比数列,其中
,且
,
成等比数列,
.
(1)求
的通项公式;
(2)求数列
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/ab4019d78daff555c9aaed8d9d6bffea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efcd745655eaf94df405f8c9778a36cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f59a47e9e040da925801cbbd6d599391.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1925d13d3bb0c0bb1840e5492e2faf4.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e567d7e9761951a266953c8d5042ac.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec4bdc2a6d4fc387dc621f0b5a268c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
6 . 图中的数阵满足:每一行从左到右成等差数列,每一列从上到下成等比数列,且公比均为实数
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe9017f8928f6148ca215d9ac435a59e.png)
(1)设
,求数列
的通项公式;
(2)设
,是否存在实数
,使
恒成立,若存在,求出
的所有值,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cdb8ef6259a96019efc1e589571e71c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe9017f8928f6148ca215d9ac435a59e.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21bf0b36adf8adffb0918c31df2783ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/916a57a8e983c6650c9bd0eb3ff4fdb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93b06884c5212c4494191dbf5ba7bdff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
7 . 已知数列
的前
项和为
,
,且
,则
的最大值为_______ .
![](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/50683cf222b4970b093e6669ae134d3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1854c0f71b6bc69ea81cf7ade3b3d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
您最近一年使用:0次
名校
解题方法
8 . 数列
,
满足
,
,
.
(1)求证:
是常数列;
(2)设
,
,求
的最大项.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fd5e930c60a978246138ae0e02f12c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/390636a89883bd64bf8da9bf8654aff9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d765033fa3e470b4b4bae90a28514587.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea39b0504526aeef83ef3a2cb165d673.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86fc336b4a83bf6d66c4afcc431597f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59dd6c97d2ee3e74ba5730f1cbcc1d43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
您最近一年使用:0次
2023-06-06更新
|
324次组卷
|
2卷引用:吉林省长春吉大附中实验学校2023届高三下学期第五次模拟考试数学试题
名校
解题方法
9 . 如图,在
所在平面内,分别以
为边向外作正方形
和正方形
.记
的内角
的对边分别为
,面积为
,已知
,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90dd3a66b4f1a44eca56618577abbc64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66536b6d4dd18013c97f385c3224416.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/641f2afd08951b21ceecc845de9dbe3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c14f2593ba40c557120093626d19eb49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38489a85288b2d0218c9525b0ebd39a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed9433a64db1a8992c50df38f66a0495.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6152ff1a02bdd1fc86f6af40507c5f67.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/9/3b84cd34-6632-410d-aa86-3f7162e035d3.png?resizew=207)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
解题方法
10 .
为数列
的前
项和,已知
,且
.
(1)求数列
的通项公式
;
(2)数列
依次为:
,规律是在
和
中间插入
项,所有插入的项构成以3为首项,3为公比的等比数列,求数列
的前100项的和.
![](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/60ec1b38901e953037a3343e0070fd6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9645bd4d2002993b90ec6d48f9c04f7.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c2277be128110558aca68f1a3bc4a41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f255d0395fba51ca2d44293cca42e0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/217b927efe12a98e1082ecd7f035b921.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09ea71117a2bf34302a0d2017e1c60e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
您最近一年使用:0次
2023-06-04更新
|
980次组卷
|
4卷引用:吉林省通化市梅河口市第五中学2023届高三下学期第七次模拟考试数学试题
吉林省通化市梅河口市第五中学2023届高三下学期第七次模拟考试数学试题江苏省苏州工业园区星海实验中学2023-2024学年高二上学期第一次月考数学试题(已下线)第05讲 数列求和(九大题型)(讲义)(已下线)重难点突破01 数列的综合应用 (十三大题型)-2