名校
1 . 如图,
是水平放置的平面图形的斜二测直观图.
(2)若
的面积是
,求原图形中
边上的高和原图形的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ee6e1d480ece7117e1f87ebf4bbeea.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88c13c520d5bf00f0fb6af550391c481.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
您最近一年使用:0次
2024-05-31更新
|
174次组卷
|
14卷引用:安徽省合肥市第七中学紫蓬分校(肥西农兴中学)2022-2023学年高一下学期期中考试数学试题
安徽省合肥市第七中学紫蓬分校(肥西农兴中学)2022-2023学年高一下学期期中考试数学试题(已下线)模块一 专题5 基本立体图形和直观图 B提升卷8.2立体图形的直观图练习(已下线)专题09 立体几何(5大易错点分析+解题模板+举一反三+易错题通关)-1(已下线)第03讲 8.2 立体图形的直观图-【帮课堂】(人教A版2019必修第二册)(已下线)8.2立体图形的直观图(分层作业)-【上好课】(已下线)专题8.11 立体几何初步全章十四大压轴题型归纳(拔尖篇)-举一反三系列(已下线)专题14 立体图形的直观图-《重难点题型·高分突破》(人教A版2019必修第二册)(已下线)专题13.1基本立体图形-重难点突破及混淆易错规避(苏教版2019必修第二册)(已下线)专题3.2直观图及表面积体积-重难点突破及混淆易错规避(人教A版2019必修第二册)(已下线)11.1.1 空间几何体与斜二测画法-【帮课堂】(人教B版2019必修第四册)(已下线)第十一章:立体几何初步章末重点题型复习(1)-同步精品课堂(人教B版2019必修第四册)(已下线)8.2 立体图形的直观图-同步精品课堂(人教A版2019必修第二册)(已下线)13.1 基本立体图形(2)-【帮课堂】(苏教版2019必修第二册)
名校
解题方法
2 . 若数列
是等差数列,则称数列
为调和数列.若实数
、
、
依次成调和数列,则称
是
和
的调和中项.
(1)求
和4的调和中项;
(2)已知调和数列
,
,
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cf1da18d91f7c98086553d157d1a87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.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/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(2)已知调和数列
![](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/d13a3abeb803e07064e5078f1710c4aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7706e0dba93c9f25c28bc8b01de44b70.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
2024-05-21更新
|
492次组卷
|
6卷引用:模块一专题2《数列的通项公式与求和》单元检测篇A基础卷(高二人教B版)
(已下线)模块一专题2《数列的通项公式与求和》单元检测篇A基础卷(高二人教B版)(已下线)模块一 专题3《数列的通项公式与求和》单元检测篇A基础卷(高二北师大版)吉林省长春市第八中学2023-2024学年高二下学期期中考试数学试题湖北省孝感市重点高中教科研协作体2023-2024学年高二下学期4月期中考试数学试题(已下线)模块三 专题3 高考新题型专练(专题2:新定义专练)(北师大)(高二)(已下线)4.4数学归纳法
解题方法
3 . 在等差数列
中,
,且等差数列
的公差为4.
(1)求
;
(2)若
,数列
的前
项和为
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7def23f30138e0b7c4c1e498d6903a6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa0dc13236eaa2bd0cdc0f24beea11fe.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e35eeaabd951fb09b2926807da3685b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fac38d4f22fc7608ae65bdec45509ca0.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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/427569657805270edf0c0150d1f67eb1.png)
您最近一年使用:0次
2024-05-14更新
|
1131次组卷
|
3卷引用:模块五 专题6 全真拔高模拟6(人教B版高二期中研习)
2024·全国·模拟预测
4 . 已知正项数列
满足
.
(1)从下面两个条件中任选一个作为已知条件,求数列
的通项公式;
条件①:当
时,
;
条件②:数列
与
均为等差数列;
(2)在(1)的基础上,设
为数列
的前n项和,证明:
.
注:若选择多个条件分别解答,则按第一个解答计分.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
(1)从下面两个条件中任选一个作为已知条件,求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
条件①:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2fee8da2f7ea58e95e5f4bb4b2176e1.png)
条件②:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c133f850a40f4d23c30fa91a1e7d74a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bf3da897eb73b729f66bb0d700775c5.png)
(2)在(1)的基础上,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cf1da18d91f7c98086553d157d1a87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab4dd193ac28d3564a8ad085210cc83b.png)
注:若选择多个条件分别解答,则按第一个解答计分.
您最近一年使用:0次
5 . 记数列
的前
项和为
,已知
,且
.
(1)令
,求数列
的通项公式;
(2)若对于任意的
恒成立,求实数
的取值范围.
![](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/bbe7bdaaf8b0adf10bf2ef6c1255b1dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21e90a1919c17006ade18c7b87ecc99a.png)
(1)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/314501f06c7e4bf3112fe41ecac7be68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)若对于任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f28a5c9346abf949d3f877b03e4327ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
名校
6 . 已知函数
的图象与
轴的相邻的两个交点之间的距离为
,且图象上一个最高点为
.
(1)求
的解析式;
(2)完善下面的表格,并画出
在
上的大致图象;
时,求
的值域.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9a5abed6dbd6d3233f032292c75af67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d49f8a63ddbca52039fa9ab44cda6b29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f95299953e2f5da02a22ad02ed2b654b.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)完善下面的表格,并画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1613d377a07850c72cbec354b7a3000f.png)
x | 0 | |||||
0 | 0 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6435963a885a6b4b2d3ba90d6534d64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
您最近一年使用:0次
名校
7 . “村BA”是由贵州省台盘村“六月六”吃新节篮球赛发展而来的赛事,比赛由村民组织,参赛者以村民为主,极具乡村气息.某学校为了研究不同性别的学生对该赛事的了解情况,进行了一次抽样调查,分别随机抽取男生和女生各80名作为样本,设事件
“了解村BA”,
“学生为女生”,据统计
.
(1)根据已知条件,作出
列联表,并判断是否有
的把握认为该校学生对“村
”的了解情况与性别有关;
(2)现从该校不了解“村BA”的学生中,采用分层随机抽样的方法抽取10名学生,再从这10名学生中随机抽取4人,设抽取的4人中男生的人数为
,求
的分布列和数学期望.
附:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9163ebe812708ee5337d62298c2e3363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17f7ab83c2c0bbcaabc2a177855d55d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4e184f07ba851dc47dc7d178f3ba0a8.png)
(1)根据已知条件,作出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b72fcdc709e77910cd36a26369648b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc3e36a8ddec055b2164ae365daf1326.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42836a867a1bacf2a7374d597bbb5673.png)
(2)现从该校不了解“村BA”的学生中,采用分层随机抽样的方法抽取10名学生,再从这10名学生中随机抽取4人,设抽取的4人中男生的人数为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
附:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aedb26578090f09dd6b9f18d9a47a235.png)
![]() | 0.050 | 0.010 | 0.005 | 0.001 |
![]() | 3.841 | 6.635 | 7.879 | 10.828 |
您最近一年使用:0次
名校
解题方法
8 . 已知数列
的前
项和为
,且
为等差数列.
(1)证明:
为等差数列;
(2)若
,数列
满足
,且
,求数列
的前
项和
.
![](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/d3768db0f2e2881b810d44ddc39ff295.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dea1dd4ffcb4cf0697ca43079f6a1f2.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1dfe5b322577f02fd19caab8cf20170.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a8d7ec3afb812286ad33dd69d80c99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c24437f62e6fab6d8baf7060f5c8ddd.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
23-24高二下·全国·期中
9 . 已知各项都为正数的数列
的前
项和为
,且
,__________.
请在下面三个条件中任选一个补充在上面题干中,再解答问题.
①
成等比数列;②
成等差数列;③![](https://staticzujuan.xkw.com/quesimg/Upload/formula/560fa5ba4a9b4c6a1a007db397aadd3f.png)
(1)求数列
的通项公式;
(2)若
,记数列
前
项和为
,证明:
.
![](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/0863215152779287204feaefc9ee35c9.png)
请在下面三个条件中任选一个补充在上面题干中,再解答问题.
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a18556fda4a825861f1170cdeb059ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1df11e4211bb602a0b3b17d09043f8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/560fa5ba4a9b4c6a1a007db397aadd3f.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9928e46511e601913619a427ded84a3.png)
您最近一年使用:0次
10 . 10世纪波斯著名数学家、天文学家阿尔·库希设计出一种方案,通过两个观测者异地同时观察同一颗流星,来测定其发射点的高度,如图,假设地球是一个标准的球体,
为地球的球心,弧
为地线,有两个观测者在地球上的
两地同时观测到一颗流星
,观测的仰角分别为
,其中
,为了方便计算,我们考虑一种理想状态,假设两个观测者在地球上的
两点测得
,地球半径为
千米,两个观测者的距离弧
千米.(参考数据:
)
发射点的近似高度
.
(2)在古希腊时代,科学不发达,人们看到流星以为这是地球水分蒸发后凝结的固体.已知对流层(地球大气层靠近地面的一层)高度大约在18千米左右,若地球半径
千米,请你据此判断该流星
是地球蒸发物还是“天外来客”,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b2447971258541c8fa18372e2f062b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44cdd6cfa7ac434726640df73e0e8066.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b83e7ad1c0478dc9fb88679c4c385e54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54c0adcf16f0d702752c05aeeee874b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efe864bd478c5acacc0e3d9d206cadbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/debb80b9affaee81c10743a47437667f.png)
(2)在古希腊时代,科学不发达,人们看到流星以为这是地球水分蒸发后凝结的固体.已知对流层(地球大气层靠近地面的一层)高度大约在18千米左右,若地球半径
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