名校
1 . 已知x为正整数,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e70f27e6556affc719b3eb823a8cdf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
您最近一年使用:0次
2 . 用1、2、3、4、5组成没有重复数字的五位数
,其中满足
的五位数有
个,则在
的展开式中,
的系数是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/762529cb88e72b16781e15052469306d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c65cdf19764c6fb1fb13ac8157dccf77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f896340ddae87456edd4150cdfe2eb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0a89e3c30f6e4d4c5db4378b05d987.png)
您最近一年使用:0次
2024-04-16更新
|
478次组卷
|
2卷引用:上海市位育中学2023-2024学年高二下学期3月月考数学试卷
名校
3 . 已知
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03a1fbcc61f9fd7cadcf38750e64c81b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
您最近一年使用:0次
4 . 已知
为正整数,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b84904ce2cee32ac5d0c76a2d0f56b2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
您最近一年使用:0次
5 . 满足方程
的
的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee70216ad740b236fa227770dd70218c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
您最近一年使用:0次
名校
6 . 若
,则正整数
的值为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7405ef562e66e3f985c4f096ac4d37c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
您最近一年使用:0次
2024-03-29更新
|
1095次组卷
|
4卷引用:上海市浦东新区上海实验学校2024届高三下学期2月测验数学试卷
上海市浦东新区上海实验学校2024届高三下学期2月测验数学试卷江苏省连云港市东海高级中学2023-2024学年高二下学期第一次月考数学试卷(已下线)专题2.3 组合及组合数(九个重难点突破)-2023-2024学年高二数学下学期重难点突破及混淆易错规避(人教A版2019)(已下线)湖北省“荆、荆、襄、宜四地七校”考试联盟2023-2024学年高二下学期期中联考数学试卷变式题11-15
7 . 若
,则
的值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/111d79bf1953dea6dc77d98ae64e43cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/303a43b24784598f9ce2fc82446b065b.png)
您最近一年使用:0次
2024-01-02更新
|
695次组卷
|
4卷引用:上海市奉贤中学2023-2024学年高二下学期3月月考数学试卷
上海市奉贤中学2023-2024学年高二下学期3月月考数学试卷福建省龙岩市长汀县第一中学分校2023-2024学年高二上学期月考三数学试题上海市格致中学2023-2024学年高二下学期期中考试数学试题(已下线)第03讲 6.2.3组合+6.2.4组合数(知识清单+8类热点题型精讲+强化分层精练)-【帮课堂】2023-2024学年高二数学同步学与练(人教A版2019选择性必修第三册)
8 . 若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccb61fe60bbba6fe73acc512b1cafd1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
您最近一年使用:0次
9 . 化简:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57693c2142ba671eb294463266df32e1.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57693c2142ba671eb294463266df32e1.png)
您最近一年使用:0次
10 . 下列四个组合数公式:对
,约定
,有
(1)
;
(2)
;
(3)
;
(4)
;
其中正确公式的个数是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acb8456229d61c359272d63b53a438b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfda4fe6fcc61e110c3e64c9e7554c97.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45ca0cda1861f1bf7f6923d355b98df0.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/484f4b2a498a64800c67bb78bef78044.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/374c513edcc64ea2c4d0efac58b4ab15.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9bc33684f8f50fa8a27ac3f0d92c8ce.png)
其中正确公式的个数是
您最近一年使用:0次