名校
解题方法
1 . 某中学共有
人,其中男生
人,女生
人,为了了解该校学生每周平均体育锻炼时间的情况以及该校学生每周平均体育锻炼时间是否与性别有关,现在用分层抽样的方法从中收集
位学生每周平均体育锻炼时间的样本数据(单位:小时),其频率分布直方图如下:
,其中
.
已知在样本数据中,有
位女生的每周平均体育锻炼时间超过
小时,根据独立性检验原理,我们
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d4b31ff8c25710c8c0d3480f5c18d3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cc838b8544b339ae170de4f8a75f69d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d69c0fc5595aadf8e59662c20c515b58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b685c556cc423e4833c1dc671a134cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7afe5c35767378b30c62f9fe5aa8882.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356b05e46b10ee51c3e43546d73ec96c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b3779b4ea5477aebfe85113b0de1d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
A.没有理由认为“该校学生每周平均体育锻炼时间与性别有关” |
B.有![]() |
C.有![]() |
D.有![]() |
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2018-06-14更新
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2卷引用:山东省临沂市2017-2018学年高二下学期期中联考数学(文)试题
2 . 设复数
的共轭复数为
,且
,
,复数
对应复平面的向量
,求
的值和
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d41042207515dd2e8349c805e6aee400.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31a097e06793a3ecf06a9cad03bbb4cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e14d903e6fe39bb602a8c68d92d7cf65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6c5f3b299b495f7df507f03673ae00c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d00da1c29aea46e36cda0f5780966bb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a6cea6878c2dae045bea94bbdc96ad.png)
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2018-06-05更新
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3卷引用:【全国市级联考】山东省聊城市2017-2018学年高二下学期期中考试数学(文)试题
名校
3 . 若
为虚数单位,复数
满足
,则
的最大值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b70c2519610d6d1d6d0855b0f27dfc5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724f9a77bc87c76cac4303d9c486365d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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名校
4 . 传承传统文化再掀热潮,央视科教频道以诗词知识竞赛为主的《中国诗词大会》火爆荧屏.将中学组和大学组的参赛选手按成绩分为优秀、良好、一般三个等级,随机从中抽取了
名选手进行调查,下面是根据调查结果绘制的选手等级人数的条形图.
![](https://img.xkw.com/dksih/QBM/2018/6/26/1975476898766848/1978473909100544/STEM/b47a1487edb342b78a2fd7b6e79e55b0.png?resizew=230)
(1)若将一般等级和良好等级合称为合格等级,根据已知条件完成下面的
列联表,并据此资料你是否有
的把握认为选手成绩“优秀”与文化程度有关?
注:
,其中
.
(2)若参赛选手共
万人,用频率估计概率,试估计其中优秀等级的选手人数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/366d02f85d55ee1188ed6e19c0ce0b91.png)
![](https://img.xkw.com/dksih/QBM/2018/6/26/1975476898766848/1978473909100544/STEM/b47a1487edb342b78a2fd7b6e79e55b0.png?resizew=230)
优秀 | 合格 | 合计 | |
大学组 | |||
中学组 | |||
合计 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891cd70171394e461811efc2d40878ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b6dea4a951bbd339f17e18d43dd0371.png)
注:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccfeb475f7e86be4fb10c6ae0e2f7f4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e34f3f875025ecc63bdd33b4f7a1deb.png)
![]() | ![]() | ![]() | ![]() |
![]() | ![]() | ![]() | ![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
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2018-05-24更新
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2卷引用:【全国百强校】山东省济宁市第一中学2017-2018学年高二下学期期中考试数学(文)试题
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5 . 某种新产品投放市场一段时间后,经过调研获得了时间
(天数)与销售单价
(元)的一组数据,且做了一定的数据处理(如表),并作出了散点图(如图)
表中
,
.
![](https://img.xkw.com/dksih/QBM/2018/5/23/1951678634180608/1952265147367424/STEM/358a505daf8b453dbf1c96abf7bb6c96.png?resizew=167)
(1)根据散点图判断,
与
哪一个更适宜作价格
关于时间
的回归方程类型?(不必说明理由)
(2)根据判断结果和表中数据,建立
关于
的回归方程;
(3)若该产品的日销售量
(件)与时间
的函数关系为
(
),求该产品投放市场第几天的销售额最高?最高为多少元?(结果保留整数)
附:对于一组数据
,
,
,
,
,其回归直线
的斜率和截距的最小二乘估计分别为
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cff289ff5e080b5e72a322437949c53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27cb8fcb04479eae360a14a15af7ce46.png)
![](https://img.xkw.com/dksih/QBM/2018/5/23/1951678634180608/1952265147367424/STEM/358a505daf8b453dbf1c96abf7bb6c96.png?resizew=167)
(1)根据散点图判断,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a10cb9fd6d5c388cd9d28556d9e9dd8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c93140c93dd1687891ff43d3b73a8e72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)根据判断结果和表中数据,建立
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)若该产品的日销售量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0e6004601681a8c3e8039030badd319.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a96119cc3005adf559140161bd872143.png)
附:对于一组数据
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18f7c0bb192b17b551ddfb87de69a1fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a155f316cb831e98d4d70564972ae16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99388b7f14c59d1cc4bbdce127060f81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9203ed2141bfb14e091870e589b3b08d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6356cbbfea6a72b818abc8c1002947b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c721f4f8cbe98fd56b079ed7cb64614d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81ff0671492cc8f5ae8faea92afb4c2d.png)
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2018-05-24更新
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2卷引用:【全国百强校】山东省济宁市第一中学2017-2018学年高二下学期期中考试数学(文)试题
6 . 已知
,且满足
.
(1)求
;
(2)若
,
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/255483db09b1e523a4fcc1f618b98ec4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/815bb5d5fb1456120cbf8fc397a06a34.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2725a89d93c791f7a0098f4964587905.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca50f6e458e5a85aabc950bd7fe3bbe9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/575eaf40e9dd07b5450ecc1b0d0bb95c.png)
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6卷引用:【全国百强校】山东省济宁市第一中学2017-2018学年高二下学期期中考试数学(文)试题
【全国百强校】山东省济宁市第一中学2017-2018学年高二下学期期中考试数学(文)试题上海市南洋模范中学2016-2017学年高二下学期期中数学试题上海市吴淞中学2018-2019学年高二上学期期末数学试题上海市金山中学2015-2016学年高二下学期第一次月考数学试题(已下线)专题3.3 复数【易错题型专项训练】-2020-2021学年高二数学下学期期末专项复习(沪教版)沪教版(2020) 必修第二册 新课改一课一练 期末复习A
名校
7 . 定义
,
,
,
的运算分别对应右图中的(1),(2),(3),(4),则图中,
,
对应的运算是
![](https://img.xkw.com/dksih/QBM/2018/5/23/1951678634180608/1952265146785792/STEM/8a3e1bf3b306415f98b31f4cfa3827ef.png?resizew=294)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff5231cb0bfedf2f963c1830adfd74aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0d53e88f57b70212698434ba128616c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe577ab0905a8c4e660241f329395e39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bf7243acd3ff7d1e699c9481076d8aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://img.xkw.com/dksih/QBM/2018/5/23/1951678634180608/1952265146785792/STEM/8a3e1bf3b306415f98b31f4cfa3827ef.png?resizew=294)
A.![]() ![]() | B.![]() ![]() | C.![]() ![]() | D.![]() ![]() |
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2卷引用:【全国百强校】山东省济宁市第一中学2017-2018学年高二下学期期中考试数学(文)试题
8 . 牛顿通过研究发现,形如
形式的可以展开成关于
的多项式,即![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07d47c82090a9e3636a3d29876f54bb5.png)
的形式其中各项的系数可以采用“逐次求导赋值法”计算.例如:在原式中令
可以求得
,第一次求导数之后再取
,可求得
,再次求导之后取
可求得
,依次下去可以求得任意-项的系数,设
...,则当
时,
__ .(用分数表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b74cd97a3d4dab5c76ecb7a55af6c5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07d47c82090a9e3636a3d29876f54bb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f829c29cb6941122cfacc173ff47bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f35f7dcce39f3d4dc6b7faf84dc1d0a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83b1fb66be1e9646abeb13de746456b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45cf86650443d1b86c79b1e3edc7e5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ce2b47812fce4b17fd813d0e4cce21.png)
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9 . ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b50eb848812375d5eeadfe2b6183568a.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b50eb848812375d5eeadfe2b6183568a.png)
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2018-05-21更新
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2卷引用:【全国市级联考】山东省聊城市2017-2018学年高二下学期期中考试数学(文)试题
10 . 甲、乙、丙、丁四人进行选择题解题比赛,已知每个选择题选择正确得
分,否则得
分.其测试结果如下:甲解题正确的个数小于乙解题正确的个数,乙解题正确的个数小于丙解题正确的个数,丙解题正确的个数小于丁解题正确的个数;且丁解题正确的个数的
倍小于甲解题正确的个数的
倍,则这四人测试总得分数最少为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2018-05-21更新
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154次组卷
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2卷引用:【全国市级联考】山东省聊城市2017-2018学年高二下学期期中考试数学(文)试题