名校
1 . 2022年2月6日,中国女足在两球落后的情况下,发扬永不言弃的拼搏精神,最终以3比2强势逆转击败韩国女足时隔十六年再夺亚洲杯冠军.铿锵玫瑰们的此次夺冠让我们热血沸腾,为之自豪!我们要向女足学习,以坚忍不拔的意志与永不言弃的精神去面对困难,奋勇拼搏,成就出彩人生!
(1)为了解喜爱足球运动是否与性别有关,随机抽取了男性和女性各100名观众进行调查,得到如下等高堆积条形图:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/13/8b44f936-5517-4653-84e4-e7ee54a1dbc3.png?resizew=254)
①根据等高条堆积形图分析喜爱足球运动是否与性别行关;
②请填写2
2列联表并根据小概率值a=0.001的独立性检验,分析男性是否更喜爱足球运动.
(2)2022年卡塔尔世界杯足球赛将于2022年11月2111至12月18日在卡塔尔境内举行,在2022年卡塔尔世界杯亚洲区预选赛十二强赛中,中国男足以1胜3平6负进9球失19球的成绩惨败出局.甲、乙、丙、丁四个足球爱好者决定加强训练提高球技,他们进行传球训练,已知甲传给乙的概率为
,传给丁的概率为
;乙传给丙的概率为
,传给甲的概率为
;丙传给丁的概率为
,传给乙的概率为
,丁传给丙的概率为
,传给甲的概率为
.一开始球由甲控制,从甲开始传球.
(i)若经过三次传球,传给甲的球的次数为
,求
的分布列和均值;
(ii)记
为经过
次传球后球传到甲的概率,
①写出
的值,并说明其实际含义;
②求证:
为等比数列,并求
.
附:
,其中
.
(1)为了解喜爱足球运动是否与性别有关,随机抽取了男性和女性各100名观众进行调查,得到如下等高堆积条形图:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/13/8b44f936-5517-4653-84e4-e7ee54a1dbc3.png?resizew=254)
喜爱足球运动 | 不喜爱足球运动 | 合计 | |
男性 | |||
女性 | |||
合计 |
②请填写2
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2468403b3eba9e40bfa36f464e927738.png)
(2)2022年卡塔尔世界杯足球赛将于2022年11月2111至12月18日在卡塔尔境内举行,在2022年卡塔尔世界杯亚洲区预选赛十二强赛中,中国男足以1胜3平6负进9球失19球的成绩惨败出局.甲、乙、丙、丁四个足球爱好者决定加强训练提高球技,他们进行传球训练,已知甲传给乙的概率为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac97e6740365c85ad857aff85cefbe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d33adb74906403b0b00fcbd9fa691d8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d33adb74906403b0b00fcbd9fa691d8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac97e6740365c85ad857aff85cefbe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac97e6740365c85ad857aff85cefbe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d33adb74906403b0b00fcbd9fa691d8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac97e6740365c85ad857aff85cefbe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d33adb74906403b0b00fcbd9fa691d8b.png)
(i)若经过三次传球,传给甲的球的次数为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
(ii)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ffb021aa7d5a5c2f0691e337caad624.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
①写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04aab74abe1a534b647a241fa9af585c.png)
②求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/774b66e288d28411ee6d3ea465591d4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ffb021aa7d5a5c2f0691e337caad624.png)
附:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f503f0dec4cf2cc95ad9521c5eaf9f18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356b05e46b10ee51c3e43546d73ec96c.png)
![]() | ![]() | ![]() | ![]() | ![]() |
![]() | ![]() | ![]() | ![]() | ![]() |
您最近一年使用:0次
2 . 在下列4个推理中:①数列
为等比数列,所以数列
的各项不为0;②由
,
,
,…,得出
;③由三角形的三条中线交于一点联想到四面体四条中线(四面体每一个顶点与对面重心的连线)交于一点;④通项公式形如
(C,
)的数列
为等比数列,则数列
为等比数列.属于演绎推理的是________ (填写序号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1db1c8f88c5de20586db0cde44d3e28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194969148c9c1b7df23d1c65f16767da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90c94bed97397edf43702cba40b6aec6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf46edf6909b855d46c16988b14b597b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb8103468bf0fa029ff9367c67c9114d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a3ac83c571110d41a396d12d8eea1c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b36caf20bb34d7507f87d6bc5cc394ac.png)
您最近一年使用:0次
2020-04-14更新
|
129次组卷
|
5卷引用:山西省大同市第一中学2019-2020学年高二下学期3月第二次考试数学(文)试题
山西省大同市第一中学2019-2020学年高二下学期3月第二次考试数学(文)试题山西省大同市第一中学2019-2020学年高二下学期3月第二次考试数学(理)试题山西省吕梁市泰化学校2020-2021学年高二下学期3月第二次考试数学(理)试题(已下线)2.1.2 演绎推理(重点练)-2020-2021学年高二数学(理)十分钟同步课堂专练(人教A版选修2-2)(已下线)2.1.2 演绎推理(重点练)-2020-2021学年高二数学(文)十分钟同步课堂专练(人教A版选修1-2)
名校
3 . 下列命题正确的是________ .(填写正确的序号)
①在等差数列
中,有
,则
;
②已知数列
是正项等比数列,且
,则
的值可能是
;
③已知函数
是定义在R上的奇函数,且对任意
,都有
成立,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9b6ed8cbd4162259985201ddfa4a049.png)
.
①在等差数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/788beef99e78bcb25b193a0e50362d9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c634e9a8afd9e6c931307dfaabb06810.png)
②已知数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3469ea4b3664ef316692458c96ac68d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f65fc200f10b97588a0c9896277c9c64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
③已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87e04b4cd16224102ef696222caa56ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9b6ed8cbd4162259985201ddfa4a049.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afcc9c8a1885dad421eb332afc8c6039.png)
您最近一年使用:0次
2020-11-20更新
|
194次组卷
|
2卷引用:宁夏六盘山高级中学2021届高三上学期第二次月考数学(文)试题
4 . 以下各说法中:
①已知在边长为
的等边三角形
中, 则
;
②若两非零向量
,若
,则
的夹角为锐角;
③已知大小分别为
与
的两个力,要使合力大小恰为
,则它们的夹角的余弦值为
;
④已知数列
的通项
,其前
项和为
,则使
最小的
值为
.
其中正确说法的有________ .(填写所有正确的序号)
①已知在边长为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05e919aa6826aa94858c261bf05d0e18.png)
②若两非零向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8ccba3b87a8a48ac3dd5f72d00bdb1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90eb96b770a4bed15037b68a77eb9667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8ccba3b87a8a48ac3dd5f72d00bdb1a.png)
③已知大小分别为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf98e72511232b14b841a5d35a607653.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8e74032b421b3c8e6323bcf6af9aee6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3842600c36ce94156ce8ecb6463a288f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
④已知数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67c4593f37ce523cfa8fb5c102240319.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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
其中正确说法的有
您最近一年使用:0次
名校
5 . 已知下列四个命题:
①等差数列一定是单调数列;
②等差数列的前
项和构成的数列一定不是单调数列;
③已知等比数列
的公比为
,若
,则数列
是单调递增数列.
④记等差数列的前
项和为
,若
,
,则数列
的最大值一定在
处达到.
其中正确的命题有_____ .(填写所有正确的命题的序号)
①等差数列一定是单调数列;
②等差数列的前
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
③已知等比数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eda6dc559d07bc22c9a0ed1e3a6d01d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
④记等差数列的前
![](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/b7bba46b546008abf9fcbb0db513385f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a417c950a40d58b01af28d2b9a57510e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ef7ca2b3e8061384501f668e59696a1.png)
其中正确的命题有
您最近一年使用:0次
名校
6 . 如图,我们在第一行填写整数0到
在第二行计算第一行相邻两数的和,像在
三角(杨辉三角)中那样,如此进行下去,在最后一行我们会得到整数是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e208d9a446b5887f30b868981cf85717.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/081c498ea0cfffb29fdee58a023b0c76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/f764d31c-257e-450f-b0c8-2255dd964f24.png?resizew=110)
您最近一年使用:0次
解题方法
7 . 已知下列命题:
①命题:“
,
”的否定是:“
,
”;
②若
,则
,
;
③若
,则
,
;
④等差数列
的前
项和为
,若
,则
;
⑤在
中,若
,则
.
其中真命题是____ .(只填写序号)
①命题:“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fb49f7407b400d314e55972e4376711.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38c2b06591c1ec3fdea6cb1bfe3d6bd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87d374ca687bd81e60d70bf24c99fb8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78a51e986a81ffb19d2fd7a5ac63e251.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b586d5da50edf2b5d624b1f3368570eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ad5fe274cfc8da2dacfb65801f344ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69d88a41a8c39757a1bbcc8ae9052c67.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a81a37e05f73b403777cb6efdb2ca3a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a28e0ab7243fc8133982902400c531f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14d6cd6c41f47a05d68ba4c933dd1761.png)
④等差数列
![](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/eb0abedd59476f8793d5a8948590a70c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa74fabc4dc46818ac65272d7a7db33d.png)
⑤在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca51be437b1a97ca92aa1159ab71102c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19dc38d888741a1b2e95fe0773a48c38.png)
其中真命题是
您最近一年使用:0次
名校
8 . 在数列
中,
,且
.记
,
,则下列判断正确的是__________ .(填写所有正确结论的编号)
①数列
为等比例数列;②存在正整数
,使得
能被11整除;
③
;④
能被51整除.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b28ef6f1b2279af482557a8ea46f2e43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96eda44551ba886992ba70e427a763e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad555526b66f2ab33ed9a56c252f8023.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f032a80a88d742cbaf00df5f7dff9944.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f30bd12847d6f7608f6778b6d14606d3.png)
①数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e160f5b23b74eb9929d6123b4cee2384.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a425978da20cebf8c4c63953579e7b35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c3b5ad9115eb354803901fc86efd7fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb352310b0ca1b455d9ff8d7cc84b9a8.png)
您最近一年使用:0次
2018-02-09更新
|
575次组卷
|
5卷引用:吉林省实验中学2018届高三上学期第六次月考数学(理)试题
2012·福建龙岩·一模
9 . 由9个正数组成的数阵
每行中的三个数成等差数列,且
,
,
成等比数列.给出下列结论:
①第二列中的
必成等比数列;
②第一列中的
不一定成等比数列;
③
;
④若9个数之和大于81,则
>9.
其中正确的序号有 .(填写所有正确结论的序号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/940d44b6c999f63f669f4e0166cba298.png)
![](https://img.xkw.com/dksih/QBM/2014/6/30/1571803114070016/1571803119640576/STEM/6c6b9fd0f3e345e6b09685f3b92f252e.png)
![](https://img.xkw.com/dksih/QBM/2014/6/30/1571803114070016/1571803119640576/STEM/15b05c9c2c864e0fb13a2006e2c9b4aa.png)
![](https://img.xkw.com/dksih/QBM/2014/6/30/1571803114070016/1571803119640576/STEM/8c5b849d14634ba799404d0e2b6cbde3.png)
①第二列中的
![](https://img.xkw.com/dksih/QBM/2014/6/30/1571803114070016/1571803119640576/STEM/dab5e3c0450d44f7bca696c85fcc94ab.png)
②第一列中的
![](https://img.xkw.com/dksih/QBM/2014/6/30/1571803114070016/1571803119640576/STEM/096cdaf0eb6742609198b9c8214667c8.png)
③
![](https://img.xkw.com/dksih/QBM/2014/6/30/1571803114070016/1571803119640576/STEM/7de5e0fbf7e24371b6ca3380b38abe1e.png)
④若9个数之和大于81,则
![](https://img.xkw.com/dksih/QBM/2014/6/30/1571803114070016/1571803119640576/STEM/2a8c23939581454ba78b9f49b2cae013.png)
其中正确的序号有 .(填写所有正确结论的序号).
您最近一年使用:0次