1 . 已知无穷数列
,构造新数列
满足
,
满足
,
,
满足
,若
为常数数列,则称
为
阶等差数列;同理令
,
,
,
,若
为常数数列,则称
为
阶等比数列.
(1)已知
为二阶等差数列,且
,
,
,求
的通项公式;
(2)若
为
阶等差数列,
为一阶等比数列,证明:
为
阶等比数列;
(3)已知
,令
的前
项和为
,
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f22e75bf99dcb0fe32f66fa90a74f9a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dc06ff2f65c456efb6a114e67b62cb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d16e3ca4fb65342b0e9a0594d661ba3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaf623a6dd661f87cf64ea150072fd78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcbdf91bb5a49f293f9b52ac8dcfa35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdc2b6b23da3e065820c15cf6c675e20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce1ca0ac3789432a3d1ce975a9a6f4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23ab5abd104649f9a3c231df9a55813a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce1ca0ac3789432a3d1ce975a9a6f4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69c653f3a05dd25f6affdba7baeab38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f0606df3b6fbc6fcf863f9c59e0e54f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdc2b6b23da3e065820c15cf6c675e20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab214e5f34d976717284bed52c645e10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/020e796a0144ff9b3329c7064a01c5c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18d8e8f821111de8075e5c3dfb22a5d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56a4b318fa151fab14b3857942ed3cb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07418f1fa0f6569b50944b5a13ffa021.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b00f4eb7f1bd2ccefbabf0c1dfa8f69.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e7778648d93a10ed66ddd99672d3ff4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a77316e06c00a9086be642f7f590684.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/a2a5a414f3f5d724058a2e887f3d1c0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c3fec47d2dd2b8099d86c87b6e57de8.png)
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3卷引用:浙江省宁波市镇海中学2024届高三下学期适应性测试数学试卷
2024高三上·全国·专题练习
解题方法
2 . 如图
,已知椭圆
的方程为
和椭圆
,其中
分别是椭圆
的左右顶点.
恰好为椭圆
的两个焦点,椭圆
和椭圆
有相同的离心率,求椭圆
的方程;
(2)如图
,若椭圆
的方程为
.
是椭圆
上一点,射线
分别交椭圆
于
,连接
(
均在
轴上方).求证:
斜率之积
为定值,求出这个定值;
(3)在(2)的条件下,若
,且两条平行线的斜率为
,求正数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/347b68f42934c74e0d759a67613a1da9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc3082b0f763a3f9a73d1c3e5e448f74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f09757d013574cf058d5bb944fdf034a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f09757d013574cf058d5bb944fdf034a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c763113a1fc48e8acc83787b8cd24eec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f09757d013574cf058d5bb944fdf034a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcaebaf8ceed245eba896f36d8ff14b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1470a8fcbdd2fa9badb34e498d14de1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b11b45b1ae99a58e5aac679974dabcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d82875c5fd5f92475e5def5fb14207fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6398cc77bc5e5a65168505985fcbc36b.png)
(3)在(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fec853fb315a3c7ce3699bc4ca0d74f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3d17816617696dc58a42cacaa454e18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
3 . 某纺织厂4月份生产了三种类型的纱线,分别为大卷纱线、中卷纱线和小卷纱线,其中大卷纱线有2000卷,中卷纱线有8000卷,小卷纱线有20000卷.为检查该纺织厂4月份生产的这三种类型纱线的质量,按比例用分层随机抽样的方法从中抽检240卷,则被抽检的小卷纱线有( )
A.120卷 | B.150卷 | C.160卷 | D.200卷 |
您最近一年使用:0次
2024·全国·模拟预测
4 . 甲、乙两名小朋友,每人手中各有3张龙年纪念卡片,其中甲手中的3张卡片为1张金色和2张银色,乙手中的3张卡片都是金色的,现在两人各从自己的卡片中随机取1张,去与对方交换,重复
次这样的操作,记甲手中银色纪念卡片
张,恰有2张银色纪念卡片的概率为
,恰有1张银色纪念卡片的概率为
.
(1)求
的值.
(2)问操作几次甲手中银色纪念卡片就可能首次出现0张,求首次出现这种情况的概率
.
(3)记
.
(i)证明数列
为等比数列,并求出
的通项公式.
(ii)求
的分布列及数学期望.(用
表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3282e5fde4ae53fcb1bb072a685304c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ffb021aa7d5a5c2f0691e337caad624.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ce603aa3abcb61750d2191aaa13dddc.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7f66b7e38f44f8cd5d48b3aa24a20fc.png)
(2)问操作几次甲手中银色纪念卡片就可能首次出现0张,求首次出现这种情况的概率
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
(3)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9131abf93295537bbc0c54a8c42e88e2.png)
(i)证明数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c895d4ce5ce82ef9b311b9369b4de11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(ii)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3282e5fde4ae53fcb1bb072a685304c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
解题方法
5 . 有以下6个函数:①
;②
;③
;④
;⑤
;⑥
.记事件
:从中任取1个函数是奇函数;事件
:从中任取1个函数是偶函数,事件
的对立事件分别为
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0865bfbdbed6158be8f799af53eeb2e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77c9320d009a17deba67f208c7d8be8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1044dcf4fba551e1b7fbfeb895ea08c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcaf2bf2e03dd6d33e03b69c5a318b90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4508929da7db1adb7cc7a70e91be543.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94281abc10cdc81b129f685b79b60bd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e53b03386ed265ae10a1b62f99f1bbb9.png)
A.![]() |
B.![]() |
C.![]() |
D.![]() |
您最近一年使用:0次
2024-06-17更新
|
296次组卷
|
4卷引用:2024届河南省名校联盟考前模拟大联考三模数学试题
2024届河南省名校联盟考前模拟大联考三模数学试题河南省濮阳市2024届高三第三次模拟考试数学试题(已下线)概率、随机变量及其分布-综合测试卷B卷海南省2020-2021学年高二下学期期末考试数学试题
名校
6 . 在等腰梯形
中,CD的中点为O,以O为坐标原点,DC所在直线为x轴,建立如图所示的平面直角坐标系,已知
.
;
(2)若点F在线段CD上,
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d2d09493b38fc4c41cb19f0c4b6f53c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1239d20fa03551421f0949d878fe541.png)
(2)若点F在线段CD上,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aef759150f9e9a60042788fbf1a7ee2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/980201d3fea976d86a818fee73faf1bd.png)
您最近一年使用:0次
2024-06-16更新
|
285次组卷
|
4卷引用:平面向量-综合测试卷B卷
7 . 已知函数
随机变量
,随机变量
,
的期望为
.
(1)当
时,求
;
(2)当
时,求
的表达式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ea8d40282dec2acfe25253514e87f81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13e73ee99d27c577561fde186de7b8f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a33261c9b0b1c3677c6db52fa88813d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/884fa804e9e4ed197c1cc76e762f6760.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be604061cf1591f7069472269d4c9719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ea01973bb7a048a88d183cb5c5cf8e2.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe08722cf9300fe188dbbb71989c06c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/884fa804e9e4ed197c1cc76e762f6760.png)
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2024-06-16更新
|
261次组卷
|
4卷引用:河南省部分重点高中2023-2024学年高三下学期5月联考数学试卷 (新高考)
河南省部分重点高中2023-2024学年高三下学期5月联考数学试卷 (新高考)(已下线)辽宁省沈阳市第二中学2024届高三下学期三模数学试题内蒙古自治区锡林郭勒盟2024届高三下学期5月模拟考试理科数学试题(已下线)概率、随机变量及其分布-综合测试卷B卷
名校
解题方法
8 . 多年统计数据表明如果甲、乙两位选手在决赛中相遇,甲每局比赛获胜的概率为
,乙每局比赛获胜的概率为
.本次世界大赛,这两位选手又在决赛中相遇.赛制为五局三胜制(最先获得三局胜利者获得冠军).
(1)现在比赛正在进行,而且乙暂时以
领先,求甲最终获得冠军的概率;
(2)若本次决赛最终甲以
的大比分获得冠军,求甲失分局序号之和
的分布列和数学期望.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
(1)现在比赛正在进行,而且乙暂时以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/124656394b0674aa1266ba4760bc602f.png)
(2)若本次决赛最终甲以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b1dcdac71e394e495d069f64e1f1ce9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
您最近一年使用:0次
2024-06-16更新
|
412次组卷
|
4卷引用:2024届河南省名校联盟考前模拟大联考三模数学试题
2024届河南省名校联盟考前模拟大联考三模数学试题陕西省西安市第一中学2023-2024学年高三下学期高考考前模拟考试理科数学试题河南省濮阳市2024届高三第三次模拟考试数学试题(已下线)概率、随机变量及其分布-综合测试卷A卷
9 . 进位制是人们为了计数和运算方便而约定的记数系统,如果约定满二进一,就是二进制:满十进一,就是十进制:满十六进一,就是十六进制.k进制的基数就是k.我们日常生活中最熟悉、最常用的就是十进制.例如,数3721也可以表示为:
一般地,如果k是大于1的整数,那么以k为基数的k进制数可以表示为
.其中
.为了简便,也会把它写成一串数字连写在一起的形式:
,如果不加下标就默认是十进制.
(1)令集合
,将B中的元素按从大到小的顺序排列,则第100个数为多少?
(2)若
,记
为整数n的二进制表达式中0的个数,如
,求
的值.(用数字作答)
(3)十进制中的数999在其他进制中是否也可以表示成一个各位数字之和为27的三位数?如果能,请求出所有的k进制数;如果不能,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8e187d488943587384ba81366d7cb2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf78d6c2cd4fab5d71e969af0f530e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d47daf899fce1cb06151012a09153d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79224c6579e5f93906b81de9a7f8dbfd.png)
(1)令集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b963d591925c79c381bb8c7cf8121390.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39bc26525689d068504cd9298b19d424.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c51592137a3a852f5c802be493e065a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39009f3279d0431b9b444634f18f355b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a80cc2a98cd5e91efa4169a97d4e8e1.png)
(3)十进制中的数999在其他进制中是否也可以表示成一个各位数字之和为27的三位数?如果能,请求出所有的k进制数;如果不能,请说明理由.
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10 . 如图,水面高度均为2的圆锥、圆柱容器的底面半径相等,高均为4(不考虑容器厚度及圆锥容器开口).现将圆锥容器内的水全部倒入圆柱容器内,则倒入前后圆柱容器内水的体积之比为( )
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2024-06-14更新
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1105次组卷
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5卷引用:高三数学考前押题卷1
(已下线)高三数学考前押题卷1(已下线)艺体生押题卷三2024届普通高招全国统一考试临考预测押题密卷数学试题(A卷)(已下线)立体几何与空间向量-综合测试卷B卷四川省成都市第七中学2023-2024学高一下学期6月月考数学试题