1 . 已知无穷数列
是首项为1,各项均为正整数的递增数列,集合
.若对于集合A中的元素k,数列
中存在不相同的项
,使得
,则称数列
具有性质
,记集合
数列
具有性质
.
(1)若数列
的通项公式为
写出集合A与集合B;
(2)若集合A与集合B都是非空集合,且集合A中的最小元素为t,集合B中的最小元素为s,当
时,证明:
;
(3)若
满足
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86d70b1ef068e07c0ed707c17c11ffd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82079a5446d448fb1bea730b968d7e02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9652602f1d23494c53743efe03db6bdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e577f08c801db946d97a024545bb5ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0380d25c8bccf9b2abdb668fb1bc5400.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/259af6f2d42a977dc6db0da888f6428a.png)
(1)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dec7ba4ecbcc20bfb5b7b3f473050eb0.png)
(2)若集合A与集合B都是非空集合,且集合A中的最小元素为t,集合B中的最小元素为s,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/682cbe4cd0d5cf5beb79d3ab89a117f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/997ba7c3da0821973b7f44d2ca07fcd1.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d5a9b7c16226569966db27c11982f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46a70d32c64918aa4d1d9d3ce0bdbf7b.png)
您最近一年使用:0次
22-23高三上·北京房山·开学考试
解题方法
2 . 设
和
是两个等差数列,记
,其中
表示
这
个数中最小的数.
(1)若
,
,求
的值;
(2)若
,
,证明
是等差数列;
(3)证明:或者对任意实数
,存在正整数
,当
时,
;或者存在正整数
,使得
是等差数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ec5456cafab2bd861b17181ac14f70e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b843e0dc4116c34c56f0c92c8c7ccd6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccb05531d4fd9e4c4926c18b427ce090.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adf6e05fd55462f9c5acca3cf6ee46e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfd5bf623242a22364d6fb33731cf7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/900b1d4f3f32b401c8e3d788df7035b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5873c01192b7d33b7483f444f90b5b0.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a08cafcb17e29f58f496c92a53df3bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44a8100f98999e472945ab7050af50d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae491c2bb3517ac6b65745870b500636.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34fd15570bcd1cc1228fd3929a7c3f42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44a8100f98999e472945ab7050af50d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ef4c4439b36c2847b0056a116d56d4.png)
(3)证明:或者对任意实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/856b137a34d2d5b20671b7a3c7a29606.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8b754f5002b4db372cc622c99252c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75942dc6020cdaef88c28a9a077e5b08.png)
您最近一年使用:0次
3 . 已知数集
具有性质P:对任意的
,使得
成立.
(1)分别判断数集
与
是否具有性质P,并说明理由;
(2)已知
,求证:
;
(3)若
,求数集A中所有元素的和的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30b7edfe73bdd0bb2a6e84512b62bdc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a921d157d198de0f934da07e16dc7df3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1e76d1341e8e6bd89b7075150536bd.png)
(1)分别判断数集
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59970351aa04d29f62d480c7280763e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37a3069c8accda13019e775a5dc198c2.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/108bce68aab5565c4ed9a0c3e11150e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7006f52b1f7cf1bdf8374bd2da3e4562.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91a94ec87afbc073e077f2c453a304b.png)
您最近一年使用:0次
2022-05-13更新
|
1012次组卷
|
7卷引用:北京市房山区2022届高三二模数学试题
名校
解题方法
4 . 已知椭圆
的一个顶点为
,一个焦点为
.
(1)求椭圆C的方程和离心率;
(2)已知点
,过原点O的直线交椭圆C于M,N两点,直线
与椭圆C的另一个交点为Q.若
的面积等于
,求直线
的斜率.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953bfeb398bab2b2ba61b3e6bf0a22e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53a948d2f7732d7f03e986c63712089b.png)
(1)求椭圆C的方程和离心率;
(2)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d059a0d71bddb677c603d84fac444b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed283a253b61df01f2a1cdc0cd8003f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cee7999b079f73b469a90326b151a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
您最近一年使用:0次
2022-05-13更新
|
1433次组卷
|
5卷引用:北京市房山区2022届高三二模数学试题
名校
5 . 已知数集
.如果对任意的i,j(
且
),
与
两数中至少有一个属于A.则称数集A具有性质P.
(1)分别判断数集
是否具有性质P,并说明理由:
(2)设数集
具有性质P.
①若
,证明:对任意
都有
是
的因数;
②证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a988803f3881afaa6e10917f0c53cc32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31ae331839bce8f3c14d7efd7f9d8915.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cded4b2983d8d1ab4c093e5334c6aee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f52783e7a39f438adf08ef7d05d8c78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf9fc9e8c9940547678ff7934363f52.png)
(1)分别判断数集
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db366f386796ab7dfd5f3b9a9903d404.png)
(2)设数集
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e21111c1f93a2d3be25d33acbfe008c3.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0e868355fb99c713842d39a1689a8d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52c5d1969a8e26392e7e947b8279154c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50a272adba0f1120109824440f0e252c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
②证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ed6f5e1411e8bc6bc938a9b84929ff2.png)
您最近一年使用:0次
2021-05-10更新
|
1164次组卷
|
3卷引用:北京市房山区2021届高三二模数学试题
名校
6 . 设
是不小于3的正整数,集合
,对于集合
中任意两个元素
,
.
定义1:
.
定义2:若
,则称
,
互为相反元素,记作
,或
.
(Ⅰ)若
,
,
,试写出
,
,以及
的值;
(Ⅱ)若
,证明:
;
(Ⅲ)设
是小于
的正奇数,至少含有两个元素的集合
,且对于集合
中任意两个不相同的元素
,
,都有
,试求集合
中元素个数的所有可能值.
![](https://img.xkw.com/dksih/QBM/2019/5/29/2213677049249792/2214678931529728/STEM/fc9eda8df5794756b0651aad13deae50.png?resizew=13)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35d9fcf5398bd0f9857193430bdea44d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecfb4290cab93c0521d2596031625448.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dab4bb60c49a5bc66f40a13fd77fd45c.png)
定义1:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1b907e477157421788070fa7b168315.png)
定义2:若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa934581daabe793f049138397ef34b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecfb4290cab93c0521d2596031625448.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dab4bb60c49a5bc66f40a13fd77fd45c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/601614c932fe6d852fff76488eebcce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ab1d8e0b76ed11ddddbc2c14554000b.png)
(Ⅰ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be604061cf1591f7069472269d4c9719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94e4a92a0731d0eaca247a21a4a2aadc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d52b1ec97d7091a7d0d267dffff3f7ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce9297cd87607255b5c2258b00d43c70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cce7c9333b595345225d8a1925e4d581.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4825990d7720b3e88f14deb1e7123ef.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e77ba8c90d21237670483bbcd8ac63b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c06cadeefb15a08344b91b954245691.png)
(Ⅲ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e83925c979f4f0d3802cdfa37a88c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecfb4290cab93c0521d2596031625448.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dab4bb60c49a5bc66f40a13fd77fd45c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47c81713099c880d5bae5e8bfedc96fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
您最近一年使用:0次
2019-05-30更新
|
1233次组卷
|
3卷引用:【区级联考】北京市房山区2019届高三第二次高考模拟检测数学(理科)试题
【区级联考】北京市房山区2019届高三第二次高考模拟检测数学(理科)试题上海市吴淞中学2019-2020学年高一上学期10月月考数学试题(已下线)专题03 集合中的压轴题(一)-【尖子生专用】2021-2022学年高一数学考点培优训练(人教A版2019必修第一册)
7 . 若无穷数列
满足:
,且对任意正整数
,
都为
中等于
的项的个数,则称数列
为“
数列”.
(1)请列举出三个
数列,每个
数列只写出其前5项;
(2)若数列
为一个
数列,证明:
,都有
;
(3)若数列
为一个
数列,求集合
中元素个数的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5319ade23e57d6513f39194f9372e8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7e8aacaab35df64cdf30578fe78dbba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9304e71a623c4412188a800046a970d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
(1)请列举出三个
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e2bf7f3f54d844d01a9916fa5d85304.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d41ebd083ba2fdca7e830d62e3d5181b.png)
(3)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cfa23dcccbe41356012a0dd2a5f4852.png)
您最近一年使用:0次
8 . 已知椭圆C:2x2+3y2=6的左焦点为F,过F的直线l与C交于A、B两点.
(Ⅰ)求椭圆C的离心率;
(Ⅱ)当直线l与x轴垂直时,求线段AB的长;
(Ⅲ)设线段AB的中点为P,O为坐标原点,直线OP交椭圆C交于M、N两点,是否存在直线l使得|NP|=3|PM|?若存在,求出直线l的方程;若不存在,说明理由.
(Ⅰ)求椭圆C的离心率;
(Ⅱ)当直线l与x轴垂直时,求线段AB的长;
(Ⅲ)设线段AB的中点为P,O为坐标原点,直线OP交椭圆C交于M、N两点,是否存在直线l使得|NP|=3|PM|?若存在,求出直线l的方程;若不存在,说明理由.
您最近一年使用:0次
9 . 设函数f(x)=
x3+x2+x,g(x)=2x2+4x十c.
(Ⅰ)x=﹣1是函数f(x)的极值点吗?说明理由;
(Ⅱ)当x∈[﹣3,4]对,函数f(x)与g(x)的图象有两个公共点,求c的取值范围.
(Ⅲ)证明:当x∈R时,ex+x2﹣1≥f(x).
![](https://img.xkw.com/dksih/QBM/2016/3/18/1572546264317952/1572546270314496/STEM/7ec8679b142f4cd1bf68a37ca41c1e0b.png)
(Ⅰ)x=﹣1是函数f(x)的极值点吗?说明理由;
(Ⅱ)当x∈[﹣3,4]对,函数f(x)与g(x)的图象有两个公共点,求c的取值范围.
(Ⅲ)证明:当x∈R时,ex+x2﹣1≥f(x).
您最近一年使用:0次