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1 . 若复数
,当
时,则复数
在复平面内对应的点位于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2163b24874c240049a7c688fca668922.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59919cba76f1f5ad3a65efcff2de849a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
A.第一象限 | B.第二象限 | C.第三象限 | D.第四象限 |
您最近一年使用:0次
2019-05-07更新
|
635次组卷
|
3卷引用:【全国百强校】北京市人大附中2019届高考信息卷(二)理科数学试题
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2 . 能够说明“若
,则
,
”是假命题的一组
,
的值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88af3a87c15cf2b51c7febd634dcfd5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/483bb7a3306b17b98bf68b802fc23515.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99074f989e74d5ff306b4b7b7a379c1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
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解题方法
3 . 随着手机功能的开发和使用,越来越多的人把大量的时间花在手机上,尤其是手机游戏上,而与其他人交流的时间越来越少.为调查大学生的社交情况,从北京市大学生中随机抽取100位同学,对他们拥有的相对固定的社交群体的个数进行了统计,结果如下:
(1)求
,
,
的值;
(2)若从这100位同学中随机抽取2人,求这2人中恰有1人社交群体个数超过9个的概率;
(3)以这100个人的样本数据估计北京市的总体数据且以频率估计概率,若从全市大学生 中随机抽取3人,记
表示抽到的是社交群体个数超过9个的人数,求
的分布列和数学期望
.
社交群体数量 | 频数 | 频率 |
0至3个 | 10 | 0.1 |
4至6个 | 35 | 0.35 |
7至9个 | 30 | 0.3 |
10至12个 | ![]() | ![]() |
13个以上 | 5 | ![]() |
合计 | 100 | 1 |
![](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/071a7e733d466949ac935b4b8ee8d183.png)
(2)若从这100位同学中随机抽取2人,求这2人中恰有1人社交群体个数超过9个的概率;
(3)以这100个人的样本数据估计北京市的总体数据且以频率估计概率,若从
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bf3baba074e8aeb6f3ea117865bbd1b.png)
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4 . 对关于
的方程
有近似解,必修一课本里研究过‘二分法’.现在结合导函数,介绍另一种方法‘牛顿切线法’.对曲线
,估计零点的值在
附近,然后持续实施如下‘牛顿切线法’的步骤:
在
处作曲线的切线,交
轴于点
;
在
处作曲线的切线,交
轴于点
;
在
处作曲线的切线,交
轴于点
;
得到一个数列
,它的各项就是方程
的近似解,按照数列的顺序越来越精确.请回答下列问题:
(1)求
的值;
(2)设
,求
的解析式(用
表示
);
(3)求该方程的近似解的这两种方法,‘牛顿切线法’和‘二分法’,哪一种更快?请给出你的判断和依据.(参照值:关于
的方程
有解
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccb0bd07a0eec6d37efe8f2e310b5420.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44039a9a85d356aa65b7ebec26629f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51969fc1a8030cef11cab59267689e89.png)
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43db00e106c7d08a76a7ba71ca5e63d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9df2062940530232ab124a571e951ed.png)
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d27c0ab3e2d7698f082854bafe4174dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb652143b43cc9439a347b2b1dc5cf6.png)
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc47735cc385a3474bc1dabad322304.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/367304824e7eb354ffeb937fa209d80d.png)
得到一个数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccb0bd07a0eec6d37efe8f2e310b5420.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76c0a98e6d574ec3702340e64bba6c0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/091f2176a35c27ac4bdddcda85de5bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3282e5fde4ae53fcb1bb072a685304c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3002f56900c2924bfd79fc3865b0a02e.png)
(3)求该方程的近似解的这两种方法,‘牛顿切线法’和‘二分法’,哪一种更快?请给出你的判断和依据.(参照值:关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccb0bd07a0eec6d37efe8f2e310b5420.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447f5779387dae82594a9fb34fa0d82a.png)
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5 . 函数
的部分图象如图所示.
![](https://img.xkw.com/dksih/QBM/2018/4/10/1921301381431296/1924848986947584/STEM/f69d474f4b8d48a9accce6da475087cb.png?resizew=373)
(Ⅰ)求
的解析式;
(Ⅱ)将函数
的图象向左平移
个单位长度,得到函数
的图象,令
,求函数
的单调递增区间.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa1b6556ed521a20456e0f04fcf0eac.png)
![](https://img.xkw.com/dksih/QBM/2018/4/10/1921301381431296/1924848986947584/STEM/f69d474f4b8d48a9accce6da475087cb.png?resizew=373)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(Ⅱ)将函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a1cfb60420ff7e72c1b9d64f69ae063.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71607511fdd4faa9e832345ceb2a817d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61c388166862b3ccfcc7ca749ebe5949.png)
您最近一年使用:0次
2018-04-15更新
|
943次组卷
|
5卷引用:北京市城六区2018届高三一模文科数学试题汇编之三角函数试题
解题方法
6 . 在四棱锥
中,平面
平面
.底面
为梯形,
,
,且
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/f181d201-27a7-4ba7-9ae5-5e54a6442598.png?resizew=170)
(1)求证:
;
(2)求二面角
的余弦值;
(3)若
是棱
的中点,求证:对于棱
上任意一点
,
与
都不平行.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da59b318eb096c1effa251d0ae6212ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed6281306726065e7075c579b9b66537.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/f181d201-27a7-4ba7-9ae5-5e54a6442598.png?resizew=170)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c583493109d50c9e4634c05e9042a9f.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/715cc9ea5e7d80930284ffb117142770.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/907d5147cea4c9ce855074864fe54506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
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解题方法
7 . 已知
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e46d0336ea9893b942b928a9ee57a1c.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b82ea99a2245a1d8aa3eefe54ce7c262.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e46d0336ea9893b942b928a9ee57a1c.png)
您最近一年使用:0次
2020-05-12更新
|
437次组卷
|
5卷引用:山东省德州市2018-2019学年高一下学期期末数学试题
山东省德州市2018-2019学年高一下学期期末数学试题上海市上海中学2019-2020学年高一下学期期中数学试题北京市第十二中学2020-2021学年高一下学期期末数学试题(已下线)第6章+三角【真题训练】-2020-2021学年新教材高一数学下册单元复习一遍过(沪教版2020必修第二册)上海交通大学附属中学2022-2023学年高一上学期期末考试数学试题
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8 . 如图,正方形
的边长为2,
,
分别为
的中点,
与
交于点
,将
沿
折起到
的位置,使平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/d0cc6889-a885-4280-9e83-9aa5e3fc17fa.png?resizew=412)
(Ⅰ)求证:平面
平面
;
(Ⅱ)求二面角
的余弦值;
(Ⅲ)判断线段
上是否存在点
,使
平面
?若存在,求出
的值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e18de69c62ddb28098b7688a3d724750.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f201a40fedca4ad14db193f4db2127e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e8aeeb74aa3281549eae995ffd5e1ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/004dd8ad9e5a200b3869ebfc59c2446d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cdacfb280b8545f20de32d533eecb8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/d0cc6889-a885-4280-9e83-9aa5e3fc17fa.png?resizew=412)
(Ⅰ)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7819aad781c70ab514e10032acb777c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a8035fc825a001d7d9a3dacd8271662.png)
(Ⅱ)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e014634a74ebc89f51ca225f1087f4cb.png)
(Ⅲ)判断线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06fb58b1f186b54fd5709d61c7302ff4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/641d9688e81760c02d0dfc4ba015afb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98d2f2cc97aa19f204861742af2f9ba9.png)
您最近一年使用:0次
2019-04-17更新
|
632次组卷
|
2卷引用:【区级联考】北京市大兴区2019届高三4月一模数学(理)试题
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9 . 已知集合
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdb6b1f961a97cead20afd0491d65e6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc006062578363cf7a99d3e76d086bab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95e60375f97ff7854f4d3a8b1108d2e3.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-02-15更新
|
439次组卷
|
3卷引用:2019届北京市中国人民大学附属中学高三考前热身练习数学(理)试题
10 . 在十进制数下,设a是
的各位数字之和,而b是a的各位数字之和,则b的各位数字之和是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a43254a8df1da6270b98b670ff0f743.png)
A.5 | B.6 | C.7 | D.16 |
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