1 . 抛掷甲,乙两枚质地均匀且四面上分别标有1,2,3,4的正四面体,其底面落于桌面,记所得数字分别为x,y.设
为随机变量,若
为整数,则
;若
为小于1的分数,则
;若
为大于1的分数,则
.
(1)求概率
;
(2)求
的分布列,并求其数学期望
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e48e54f2ce3af12221046e3306aab395.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4e7bf9200b351a259ddfc6c0266129d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/229bf9440a0506bc60ed22d6aa55cb62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4e7bf9200b351a259ddfc6c0266129d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ef8e5953166a00c667db9aaccef190.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4e7bf9200b351a259ddfc6c0266129d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bae2dbad02ab2aeb62452c312bd45d1.png)
(1)求概率
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab6d9c71b51f922f7a7277e0423f3ec.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e48e54f2ce3af12221046e3306aab395.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf91d54a3f1f8cdf518c49ef7678993a.png)
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名校
2 . 已知集合
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecee3d92a931e2fef806a0b5c92f6e51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
您最近一年使用:0次
2016-12-04更新
|
339次组卷
|
2卷引用:2016届江苏省扬州中学高三12月月考数学试卷
解题方法
3 . 已知
,若存在
,满足
,则称
是
的一个“友好”三角形,若等腰
存在“友好”三角形,则其顶角的度数为___ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f8b956b4db581234590571473bc875d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
2016-12-04更新
|
260次组卷
|
5卷引用:2016届江苏省扬州中学高三3月质量检测数学试卷
2016届江苏省扬州中学高三3月质量检测数学试卷2015-2016学年福建福州八中高二下期中文科数学试卷上海市松江区华东师范大学松江实验高级中学2022-2023学年高一下学期3月监测数学试卷上海市五爱高级中学2020-2021学年高一下学期开学考数学试题(已下线)上海市高一下开学考试卷-【寒假自学课】(沪教版2020)
解题方法
4 . 在边长为1的正
中,向量![](https://img.xkw.com/dksih/QBM/2016/5/31/1572664178180096/1572664183652352/STEM/2d29c0ce1c97498bad0a2691ea5988ff.png?resizew=76)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572664178180096/1572664183652352/STEM/31556a7fd5574c5d85532245aa529971.png?resizew=76)
,且
则
的最大值为________ .
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572664178180096/1572664183652352/STEM/b901bcaaa46441a782a9b02f9ddc10ac.png?resizew=45)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572664178180096/1572664183652352/STEM/2d29c0ce1c97498bad0a2691ea5988ff.png?resizew=76)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572664178180096/1572664183652352/STEM/31556a7fd5574c5d85532245aa529971.png?resizew=76)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572664178180096/1572664183652352/STEM/fabd7cb1b334408a961a70b8cb7f0630.png?resizew=77)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572664178180096/1572664183652352/STEM/faa07e5b1d5b4149b5b7fb088b16eea7.png?resizew=64)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572664178180096/1572664183652352/STEM/9957c5ae6bc448a9b71a80d8f7ac67a4.png?resizew=57)
您最近一年使用:0次
解题方法
5 . 如图,在五面体
中,四边形
是平行四边形.
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572664178180096/1572664183767040/STEM/70fd1e4654fd459e943d872f9722a504.png?resizew=214)
(1)若
,
,求证:平面
平面
;
(2)求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572664178180096/1572664183767040/STEM/70fd1e4654fd459e943d872f9722a504.png?resizew=214)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34c23e376ab222814e0029d2adb5a957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7bd02e0adeae92ba9526261b1baf797.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a5628323a7eeb11213df5c9048b3543.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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6 . 已知矩阵
的一个特征值是3,求直线
在
作用下的直线方程.
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572664178180096/1572664184029184/STEM/0309a628aa30409cb18556ffb8fff68f.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572664178180096/1572664184029184/STEM/bf07a44eb35a448a88953f452af17224.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572664178180096/1572664184029184/STEM/099bc80dec8b4d95ae42aafbb6b94b69.png)
您最近一年使用:0次
解题方法
7 . 执行如图所示的程序框图,则输出的
值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
![](https://img.xkw.com/dksih/QBM/2016/3/29/1572562302566400/1572562308046848/STEM/34c817dd-6228-4f7c-a35c-9cfc207d0006.png?resizew=143)
您最近一年使用:0次
2016-12-04更新
|
415次组卷
|
2卷引用:2016届江苏省扬州中学高三3月质量检测数学试卷
解题方法
8 . 已知集合
,
,则
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93f657cb0e693e00055286af7f8fc2bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6187cf89a4d1510614373128358f52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa593a49c5433f8c0262a5acf30b2f8b.png)
您最近一年使用:0次
2016-12-04更新
|
473次组卷
|
2卷引用:2016届江苏省扬州中学高三3月质量检测数学试卷
9 . 甲、乙两个样本数据的茎叶图(如图),则甲、乙两样本方差中较小的一个方差是____ .
![](https://img.xkw.com/dksih/QBM/2016/1/21/1572461198950400/1572461204594688/STEM/31156453-472b-4cb1-83a4-605edbf19dc2.png?resizew=241)
您最近一年使用:0次
2016-12-04更新
|
263次组卷
|
2卷引用:2016届江苏省扬州中学高三12月月考数学试卷
10 . 如果复数
为纯虚数,则
=____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08104f2e345ade6e6076b0ff0337642b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de971553ea8a66d7849b138a4a0625c5.png)
您最近一年使用:0次