1 . 古希腊毕达哥拉斯学派的数学家用沙粒和小石子来研究数,他们根据沙粒或小石子所排列的形状,把数分成许多类,如图中第一行图形中黑色小点个数:1,3,6,10,
称为三角形数,第二行图形中黑色小点个数:1,4,9,16,
称为正方形数,记三角形数构成数列
,正方形数构成数列
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07096af3b99fd1cb11c31f19a2c6408e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07096af3b99fd1cb11c31f19a2c6408e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
A.![]() |
B.1849既是三角形数,又是正方形数 |
C.![]() |
D.![]() ![]() ![]() ![]() ![]() |
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解题方法
2 . 已知
.
(1)若
,证明
与
中至少有一个小于0;
(2)若
均为正数,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c175e7e4f89080b5c19fa3fbcfc47b56.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2584d4e78881413d8ddd1ec84011db2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d9a692e9a18ebf339be5e7c25e2aac3.png)
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2024-02-22更新
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89次组卷
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2卷引用:四川省部分名校2023-2024学年高三上学期期末联合考试文科数学试题
3 . 已知
为数列
的前
项和,且
,则( )
![](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/94b7301fba4344e018aaf591fce320c4.png)
A.存在![]() ![]() | B.![]() |
C.![]() | D.![]() |
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名校
4 . 将
个互不相等的数排成下表:
,
,则下列判断中,一定不成立 的是( )
(注:
分别表示集合
最大值和最小值.)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df2213327e976dc91d4321dafddff6c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ab0218c11109aa7551f9d3982985f6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ceddaee1b0b2c2c9b20f65b45733eae.png)
(注:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a90002a4ea7a09563ff82c89107e9b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ed7b442e78e34e20513eda80b994057.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2024-01-24更新
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65次组卷
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2卷引用:广东省梅州市2023-2024学年高二上学期期末联考数学试卷
5 . 类比平面解析几何的观点,在空间中,空间平面和曲面可以看作是适合某种条件的动点的轨迹,在空间直角坐标系
中,空间平面和曲面的方程是一个三元方程
.
(1)类比平面解析几何中直线的方程,直接写出:
①过点
,法向量为
的平面的方程;
②平面的一般方程;
③在x,y,z轴上的截距分别为a,b,c的平面的截距式方程(
);(不需要说明理由)
(2)设
为空间中的两个定点,
,我们将曲面
定义为满足
的动点P的轨迹,试建立一个适当的空间直角坐标系
,并推导出曲面
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5e336d6ca2cae3d6e6c3810d7e521a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a056074124fa54255811544a9d7770.png)
(1)类比平面解析几何中直线的方程,直接写出:
①过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baf95be25d34a7366bf4060d081329c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8fda674f8f0be0a9fb282139bb09a62.png)
②平面的一般方程;
③在x,y,z轴上的截距分别为a,b,c的平面的截距式方程(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72e96f2368d04db6d0e05de46e97e29f.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9aa378e87cf809100d94487370d9b8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5f4002efd54bf0f29f36d98839f7e9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5e336d6ca2cae3d6e6c3810d7e521a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
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6 . 用数学归纳法推断
时,正整数n的第一个取值应为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/549199e4263eea97d84f00e15f1aad5b.png)
您最近一年使用:0次
2024-01-15更新
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152次组卷
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6卷引用:上海市上海师大附属宝山罗店中学2023-2024学年高二上学期期末诊断调研数学试题
上海市上海师大附属宝山罗店中学2023-2024学年高二上学期期末诊断调研数学试题(已下线)5.5数学归纳法(分层练习,6大题型)-2023-2024学年高二数学同步精品课堂(人教B版2019选择性必修第三册)(已下线)1.5 数学归纳法7种常见考法归类(2)(已下线)4.4 数学归纳法(五大题型)(分层练习)-2023-2024学年高二数学同步精品课堂(沪教版2020选择性必修第一册)(已下线)5.5 数学归纳法(2知识点+6题型+强化训练)-【帮课堂】2023-2024学年高二数学同步学与练(人教B版2019选择性必修第三册)(已下线)4.4数学归纳法——课堂例题
解题方法
7 . 已知幂的基本不等式:当
,
时,
.请利用此基本不等式解决下列相关问题:
(1)当
,
时,求
的取值范围;
(2)当
,
时,求证:
;
(3)利用(2)证明对数函数的单调性:当
时,对数函数
在
上是严格增函数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d33da711e50e96568facb18cef27165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1419108104429f6df5d5352a05211e36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db5e0630a1632f6368fb824ebfdead0d.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7326ea56be82bd616fec7e6aa3c884c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1419108104429f6df5d5352a05211e36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca16bee4a8ecee60c31f9aaac02539b0.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d33da711e50e96568facb18cef27165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27eb687fdf1568ab06ce8119845823c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c92098b3da769963a2320cf1d8dad00a.png)
(3)利用(2)证明对数函数的单调性:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d33da711e50e96568facb18cef27165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82869dad28f771d088772a2c2b08b187.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
您最近一年使用:0次
解题方法
8 . (1)设
,
用反证法证明:若
,则
或
.
(2)设
,比较
与
的值的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f370a1d4dd341e5ab1774a66c66c1204.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ae3aa00a59d5e1db4efb0aa7ece4623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fde64f4d3c38e43fbdee24eadc4b0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eec336faee8689281a6f6b465e7fcff9.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc997a4317a3b64369178b27abc44b95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f814b4dc5876d8bf3aa145593bf4cc66.png)
您最近一年使用:0次
2023-11-09更新
|
67次组卷
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2卷引用:山东省泰安市泰山外国语学校2024届高三上学期期末数学试题
9 . 如图,在一个单位正方形中,首先将它等分成4个边长为
的小正方形,保留一组不相邻的2个小正方形,记这2个小正方形的面积之和为
;然后将剩余的2个小正方形分别继续四等分,各自保留一组不相邻的2个小正方形,记这4个小正方形的面积之和为
.以此类推,操作
次,若
,则
的最小值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28b493835a62d716603959be6aabe54c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
A.9 | B.10 | C.11 | D.12 |
您最近一年使用:0次
2023-09-28更新
|
499次组卷
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6卷引用:广东省汕头市潮阳区2023-2024学年高二上学期期末数学试题
(已下线)广东省汕头市潮阳区2023-2024学年高二上学期期末数学试题广东省汕头市潮阳区2023-2024学年高二上学期期末教学质量监测数学试题浙江省嘉兴市2024届高三上学期9月基础测试数学试题陕西省西安铁一中滨河高级中学2023-2024学年高二上学期第二次月考数学试题(已下线)黄金卷04(已下线)模块五 专题1 全真基础模拟(北师大版本高二期中)
10 . 两位数
和两位数
,它们各个数位上的数字都不为0,将数
和数
的个位数字与十位数字交叉相乘再求和所得的结果记为
.例如:
.又如:
.则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3dd8061aa6b0803d371f9d418b6f0dd.png)
____________ ;若一个两位数
,两位数
(
,
,且
,
都取整数),交换
的十位数字和个位数字得到新两位数
,当
与
的个位数字的5倍的和能被11整除时,称这样的两个数
和
为“快乐数对”,则所有“快乐数对”
的最大值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b40e34f3f8e31cd6882fbceed3f72f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27f365c6a314b26500b860f145810e47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ec4f99213b50854169318c1002993c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3dd8061aa6b0803d371f9d418b6f0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8676003f043a1220213c8fa169a7e71c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c25fa0a6b9c3be012cb5b6908b155eb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/200f9560f8f90d4addcf5fb6fdcc7956.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df9807e2182a8ef6ded07aef5ca0d6d6.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/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7093538ecfb10a639b23863e7331a66d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7093538ecfb10a639b23863e7331a66d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b40e34f3f8e31cd6882fbceed3f72f.png)
您最近一年使用:0次
2023-09-14更新
|
44次组卷
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2卷引用:山东省泰安市泰山外国语学校2024届高三上学期期末数学试题