名校
解题方法
1 . 在党中央的英明领导下,在全国人民的坚定支持下,中国的抗击“新型冠状肺炎”战役取得了阶段性胜利,现在摆在我们大家面前的是有序且安全的复工复产.某商场为了提振顾客的消费信心,对某中型商品实行分期付款方式销售,根据以往资料统计,顾客购买该商品选择分期付款的期数的分布列如下,其中
,
.
(1)求购买该商品的3位顾客中,恰有1位选择分4期付款的概率;
(2)商场销售一件该商品,若顾客选择分4期付款,则商场获得的利润为2000元;若顾客选择分5期付款,则商场获得的利润为2500元;若顾客选择分6期付款,则商场获得的利润为3000元,假设该商场销售两件该商品所获得的利润为
(单位:元).
(i)设
时的概率为m,求当m取最大值时,利润
的分布列和数学期望;
(ii)设某数列
满足
,
,
,若
对任意
恒成立,求整数t的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7326ea56be82bd616fec7e6aa3c884c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05e84dbb03e8c627ff11d5c7aeb0c8b5.png)
4 | 5 | 6 | |
P | 0.4 | a | b |
(1)求购买该商品的3位顾客中,恰有1位选择分4期付款的概率;
(2)商场销售一件该商品,若顾客选择分4期付款,则商场获得的利润为2000元;若顾客选择分5期付款,则商场获得的利润为2500元;若顾客选择分6期付款,则商场获得的利润为3000元,假设该商场销售两件该商品所获得的利润为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
(i)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b361189e56be6cdae8adc3ec04bb45c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
(ii)设某数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e91a723998bd8b8bce768ac553324f9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cd16c549469c5fc768f44fff9fffa00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2374cc91a3e70ec9e378441d41f0c51d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49571fa43f71bf9eb147420af4e3021d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0166ef16246534081188fce28684b49.png)
您最近一年使用:0次
2020-08-06更新
|
1913次组卷
|
6卷引用:2020届安徽省黄山市高三第二次质量检测数学(理)试题
2020届安徽省黄山市高三第二次质量检测数学(理)试题(已下线)数学-6月大数据精选模拟卷01(北京卷)(满分冲刺篇)湖南省长沙市长郡中学2020届高三下学期高考模拟卷(二)数学(理)试题广东省深圳市外国语学校2021届高三上学期第一次月考数学试题2021届高三高考必杀技之概率统计专练(已下线)专题4.6《随机变量》单元测试卷(B卷提升篇)-2020-2021学年高二数学选择性必修第二册同步单元AB卷(新教材人教B版)
2 . 在
中,
,点
满足
,若
,其中
,动点
的轨迹所覆盖的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c464cc97160a60dc59e9951c0952313.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf15e049904ed83f114d15ce097c4686.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3906c9eb93af4888bb030115c9fdda3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69df4018644732862fd83f0564b90815.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
解题方法
3 . 已知二次函数
同时满足:
①不等式
的解集有且只有一个元素;
②在定义域内存在
,使得不等式
成立.
设数列
的前
项和
.
(1)求
的表达式.![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f53190d6ead827a6338b9de847aeaf1.png)
(2)求数列
的通项公式.![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f62295c36d2e2174908c2bec0eb5b30f.png)
(3)设
,
,
的前
项和为
,若
对任意
,
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/791763c9623e308ca90caa34ac905449.png)
①不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6acb0f1ac694dd177e99fc385f23318.png)
②在定义域内存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d41acc47493556617fe7b9e55093d10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ca3ecbbaca8eeb1cfa8f4035f7d5726.png)
设数列
![](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/715b1b3f29259c51c89e42c08b65d1b5.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f53190d6ead827a6338b9de847aeaf1.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f62295c36d2e2174908c2bec0eb5b30f.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6565e9b4b00e843e93d405b719ce21b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1ca328915923e9726c4143a0fed064.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e9af55db701e8724494c816bd48bb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd4613271f782a90ab580131d09d03d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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2021-11-28更新
|
456次组卷
|
4卷引用:2016-2017学年安徽黄山屯溪一中高二上学期摸底数学试卷
2016-2017学年安徽黄山屯溪一中高二上学期摸底数学试卷江西南昌青山湖区南昌三中雷式学校2020-2021学年高一下学期期中数学试题(已下线)第4章 数列(单元提升卷)-2021-2022学年高二数学下学期考试满分全攻略(人教A版2019选修第二册+第三册)北京市海淀区北京交通大学附属中学2022-2023学年高二下学期期中练习数学试题
2020·浙江·模拟预测
名校
4 . 已知函数
,
.
(1)求证:
有两个不同的实数解;
(2)若
在
时恒成立,求整数
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a10b2fc16709a3dabf8e35fbe1027183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df06bdef1d4a203b4174851bc270cfe5.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9587df831df1af5e7dd6be5fdc7bd8ce.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b54b110ec8ae2d3c75fc0c233fdf31b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fde64f4d3c38e43fbdee24eadc4b0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2020-07-04更新
|
339次组卷
|
4卷引用:安徽省黄山市屯溪第一中学2020-2021学年高三上学期10月月考数学(文)试题
安徽省黄山市屯溪第一中学2020-2021学年高三上学期10月月考数学(文)试题(已下线)浙江省绿色联盟2020届高三下学期高考适应性考试数学试题重庆市2021届高三上学期第一次预测性考试数学试题宁夏六盘山高级中学2021届高三上学期期中考试数学(文)试题
5 . 已知函数
,其中![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dd8b3dc4c609bab82d356a5cc2208d.png)
(Ⅰ)若
,讨论
的单调性;
(Ⅱ)若
,当
时,
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/884b86cb006510fb94f50936f5514027.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dd8b3dc4c609bab82d356a5cc2208d.png)
(Ⅰ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2fb40a36a293471742ce75f6b9635b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb02f917211bcfa3010bb2b540fbfdea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2020-06-16更新
|
496次组卷
|
3卷引用:安徽省黄山市2019-2020学年高二下学期期末考试数学(理)试题
6 . 设数列
的通项公式是
,数列
中,
.
(1)若数列
的前
项和
对于
恒成立,求
的最小值;
(2)利用裂项相消法求数列
的前
项和
,并写出数列
(
且
)的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0352c3e954483ababc8a941131daf385.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9fc82353331abee0828dee9b38c08f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d308738e2c9b5548a9b031756734d13.png)
(1)若数列
![](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/54c36236bda01f5167b7d4b6e5c1ae17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(2)利用裂项相消法求数列
![](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/838fbfcc96a7e6c1d2c76627c65c86f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a3ac83c571110d41a396d12d8eea1c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45482d31d1d7448c9f3922b4d2a55331.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22483181af13bfc93da5cf46ea5c55f0.png)
您最近一年使用:0次
7 . 点F2是双曲线
的右焦点,动点A在双曲线左支上,直线l1:tx﹣y+t﹣2=0与直线l2:x+ty+2t﹣1=0的交点为B,则|AB|+|AF2|的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/255b825a3cebc931cf58012b0e4f4444.png)
A.8 | B.![]() | C.9 | D.![]() |
您最近一年使用:0次
8 . 已知椭圆Γ:
的离心率为
,左右焦点分别为F1,F2,且A、B分别是其左右顶点,P是椭圆上任意一点,△PF1F2面积的最大值为4.
![](https://img.xkw.com/dksih/QBM/2020/5/30/2473789409927168/2474476196651008/STEM/ff634c11-d7b3-42c3-9c5d-699ace627261.png?resizew=229)
(1)求椭圆Γ的方程.
(2)如图,四边形ABCD为矩形,设M为椭圆Γ上任意一点,直线MC、MD分别交x轴于E、F,且满足
,求证:AB=2AD.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d891034f9d4ee622e083d44989b7fdc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://img.xkw.com/dksih/QBM/2020/5/30/2473789409927168/2474476196651008/STEM/ff634c11-d7b3-42c3-9c5d-699ace627261.png?resizew=229)
(1)求椭圆Γ的方程.
(2)如图,四边形ABCD为矩形,设M为椭圆Γ上任意一点,直线MC、MD分别交x轴于E、F,且满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/867da3812d8ac12c18463cbd2393e79f.png)
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名校
9 . 已知函数
.
(1)讨论函数
极值点的个数;
(2)当
时,不等式
在
上恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f6e23d0adabcd88d5a353bf723c71dd.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1219c034b74586a190b4f374bd8cce69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b029e85e686623cdef977b2cb1f207a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
2020-05-31更新
|
510次组卷
|
3卷引用:2020届安徽省黄山市高三第二次质量检测数学(理)试题
10 . 若关于
的不等式
的非空解集中无整数解,则实数
的取值范围是_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f75114969b70edbb5d0aa8b248b912e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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