名校
1 . 已知
,则
展开式中,
项的系数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72845a777fa78737b4c92a988a8b6870.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc750a9a27d4391d9f44a79f9b53802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d800f03de80068a1172beac3a2c75587.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2017-06-15更新
|
2104次组卷
|
3卷引用:河南省南阳市第一中学校2019-2020学年高二下学期第二次月考(5月)数学(理)试题
2 . 已知随机变量
服从正态分布,其正态分布密度曲线为函数
的图象,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76caaac5efcf39f3ec603f79162a23a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://img.xkw.com/dksih/QBM/2016/6/21/1572751961432064/1572751967567872/STEM/618bed2c73c74cfe87df03e2546945db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5798e815bd36d981770f7f922298b305.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76caaac5efcf39f3ec603f79162a23a5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2016-12-03更新
|
1209次组卷
|
3卷引用:2015-2016学年河南新乡一中高二普通下七次周练理数学卷