名校
解题方法
1 . 规定抽球试验规则如下:盒子中初始装有白球和红球各一个,每次有放回的任取一个,连续取两次,将以上过程记为一轮.如果每一轮取到的两个球都是白球,则记该轮为成功,否则记为失败.在抽取过程中,如果某一轮成功,则停止;否则,在盒子中再放入一个红球,然后接着进行下一轮抽球,如此不断继续下去,直至成功.
(1)某人进行该抽球试验时,最多进行三轮,即使第三轮不成功,也停止抽球,记其进行抽球试验的轮次数为随机变量
,求
的分布列和数学期望;
(2)为验证抽球试验成功的概率不超过
,有1000名数学爱好者独立的进行该抽球试验,记
表示成功时抽球试验的轮次数,
表示对应的人数,部分统计数据如下:
求
关于
的回归方程
,并预测成功的总人数(精确到1);
(3)证明:
.
附:经验回归方程系数:
,
;
参考数据:
,
,
(其中
,
).
(1)某人进行该抽球试验时,最多进行三轮,即使第三轮不成功,也停止抽球,记其进行抽球试验的轮次数为随机变量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
(2)为验证抽球试验成功的概率不超过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
1 | 2 | 3 | 4 | 5 | |
232 | 98 | 60 | 40 | 20 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cd5d2b05c1bb3d089b0b44ee0f1309b.png)
(3)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d915be3110988ff6c69b27001e2aea38.png)
附:经验回归方程系数:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eb95d42bac326c177d3d11f981d5511.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ebff20f21ae41fd8d1f1e3145895842.png)
参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34cadc0d82392089138ecd9c71006f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e22c63f3a796ae8d1cfa9e2769b26be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9141a6d3fd0084de0bfa9136e826865a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9dd2642b6808b94f8f09d6726ef3e0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0593a949e9ca8680f71bad6725806bd.png)
您最近一年使用:0次
2022-04-08更新
|
6862次组卷
|
16卷引用:江苏省南京市金陵中学2022届高三学业水平选择性模拟考前最后一卷数学试题
江苏省南京市金陵中学2022届高三学业水平选择性模拟考前最后一卷数学试题山东省青岛市2022届三下学期一模数学试题重庆市缙云教育联盟2022届高三第二次诊断性检测数学试题湖北省襄阳市第五中学2022届高三下学期适应性考试(三)数学试题(已下线)秘籍11 统计与概率-备战2022年高考数学抢分秘籍(全国通用)(已下线)第01讲 线性回归分析-【帮课堂】2021-2022学年高二数学同步精品讲义(苏教版2019选择性必修第二册)(已下线)2022年高考考前20天终极冲刺攻略(三)【数学】(新高考地区专用)(6月4日)(已下线)2022年高考考前20天终极冲刺攻略(四)【理科数学】(6月2日)江苏省无锡市天一中学2021-2022学年高二强化班下学期期中数学试题(已下线)8.6 分布列与其他知识综合运用(精讲)(已下线)专题17 概率与统计的创新题型(已下线)专题26 概率综合问题(分布列)(解答题)(理科)-1广东省东莞外国语学校2024届高三上学期第一次月考数学试题广东省七校联合体2024届高三上学期开学第一次联考(8月)数学试题专题16回归分析(已下线)专题05 成对数据的统计分析压轴题(1)
2 . 已知整数数列
的前
项和为
,且
,
.若对任意给定的
,存在正整数
,使得
对任意正整数
成立,则
的取值集合是________ .
![](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/0a97aa79f9746d819f37958c3f240965.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af5cf9c12181dd8683944b2b30bf8e08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d7e9f86738335a22298559db41037a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8363e5a1921bbce5c0fa0a286eba090.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
您最近一年使用:0次
名校
3 . 等差数列{an}的前n项和记为Sn,若a1>0,S10=S20,则( )
A.d<0 | B.a15 > 0 |
C.Sn≤S15 | D.当且仅当Sn<0时n≥32 |
您最近一年使用:0次
4 . 记数列{an}的前n项和为Sn,已知a1=1,Sn+1=4an+1.设bn=an+12an.
(1)证明:数列{bn}为等比数列;
(2)设cn=|bn100|,Tn为数列{cn}的前n项和,求T10.
(1)证明:数列{bn}为等比数列;
(2)设cn=|bn100|,Tn为数列{cn}的前n项和,求T10.
您最近一年使用:0次
2021-03-26更新
|
744次组卷
|
5卷引用:江苏省南通市通州高级中学2020-2021学年高二上学期第一次学分认定考试数学试题
5 . 双曲线
:
(
,且
),点
在双曲线上且在第一象限,其横坐标为2,由
向
的两条渐近线作垂线,垂足分别为
,
.设
的面积为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b96f7cec2e6acd07dfa442ddf67a4f49.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc31dcdb99754fc452ff2b92a2fb8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30e2987c642c47a0a9ad37eb1fd12c70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7692514a24939fee3c3fed6e699cbd64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf83e20035c3afd6d26ebfd53d768a70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf83e20035c3afd6d26ebfd53d768a70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc31dcdb99754fc452ff2b92a2fb8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ddad3d9fdb5e9951b6a1c31f9a72a71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dea30e7a3f7c68487d8bb224909b9455.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82aeb2c7ac74877047fa4ec9abbdbd2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b96f7cec2e6acd07dfa442ddf67a4f49.png)
您最近一年使用:0次
名校
解题方法
6 . 已知数列{an}满足
,若2≤a10≤3,则a1的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f42d684f722577b7772e0aee32d9fe.png)
A.1≤a1≤10 | B.1≤a1≤17 | C.2≤a1≤3 | D.2≤a1≤6 |
您最近一年使用:0次
2020-09-10更新
|
1019次组卷
|
11卷引用:浙江省2019年6月普通高中学业水平考试数学试题1
浙江省2019年6月普通高中学业水平考试数学试题1(已下线)浙江省2019年6月普通高中学业水平考试数学试题(已下线)第二章+数列(能力提升)-2020-2021学年高二数学单元测试定心卷(人教版必修5)(已下线)黄金卷03-【赢在高考·黄金20卷】备战2021年高考数学全真模拟卷(江苏专用)(已下线)2021年高考数学押题预测卷(江苏专用)01陕西省咸阳市2021届高三五月数学信息专递试题(已下线)考点突破14 数列-备战2022年高考数学一轮复习培优提升精炼(新高考地区专用)新疆新源县2020-2021学年高一下学期期末联考数学试题(已下线)第4章《数列》 培优测试卷(二)-2021-2022学年高二数学同步培优训练系列(苏教版2019选择性必修第一册)陕西省延安市第一中学2022-2023学年高二上学期第一次月考文科数学试题安徽省合肥市第一中学2023-2024学年高二上学期素质拓展训练(10)数学试题
7 . 数列
满足递推公式
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5b3fb3494a88e18ab9b39148f8e1143.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4b3fee34c85365527d44acf0d8b0c5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b58b8524cfae780c4d1f86185f81208.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5b3fb3494a88e18ab9b39148f8e1143.png)
您最近一年使用:0次
2020-04-16更新
|
572次组卷
|
5卷引用:河南省天一大联考2021届高三下学期阶段性测试(六)数学(理科) 试题
8 . 已知数列
前n项和
(
,
为常数).当
的最小值为
时,
的值是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ced008e1fe936cf44b403e47bd310bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b04c7ba0ffd54e60b2829f4440c91ec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a8219174fdf7e2954292d8f09cc9ab2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8da45c443af7994a26ffa9d8894e7262.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
A.2 | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
9 . 已知各项均为正数的数列
的前
项和为
,满足
,
,
恰为等比数列
的前3项.
(1)求数列
,
的通项公式;
(2)若
,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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3de0133fb9d97812828def4a4a24295f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/614206299653e4111ac285f5375e34c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3480c1588d7838fbc46aea96694fc76e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/905df39b3d717aac9d0c5f93a07abb67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.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
名校
10 . 由an与Sn的关系求通项公式
(1)已知数列
的前
项和为
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e70efcd7bce3216ed39911fa13993a00.png)
,求数列
的通项公式;
(2)已知正项数列
的前
项和
满足
(
).求数列
的通项公式;
(3)已知数列{an}的前n项和为Sn,a1=1,Sn=2an+1,求Sn
(4)已知正项数列
中,
,
,前n项和为
,且满足
(
).求数列
的通项公式;
(5)设数列{an}的前n项积为Tn,且Tn+2an=2(n∈N*).数列
是等差数列;求数列
的通项公式;
(1)已知数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.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/e70efcd7bce3216ed39911fa13993a00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31eb761dbf1a5a1106dad1a25ce08a89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
(2)已知正项数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.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/998911f46c0c0d0cf78b29ebfbe62366.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
(3)已知数列{an}的前n项和为Sn,a1=1,Sn=2an+1,求Sn
(4)已知正项数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9b6e51986fe5d7a7265e0e93adcb4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b92d8661eb91488a132dce504fd09b13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94c7aab4df25884973273efae244f2df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(5)设数列{an}的前n项积为Tn,且Tn+2an=2(n∈N*).数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b59e4ee90f2625164d23b7afcf4f002b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
您最近一年使用:0次