![](https://static.youtibao.com/asksite/comm/pc/images/content_title_q.png)
[单选题]
设复数z满足:(1+i)z=2﹣i,则z的虚部为()
A.1/2 i
B.1/2
C.-3/2 i
D.-3/2
![](https://static.youtibao.com/asksite/comm/pc/images/content_title_a.png)
D、-3/2
A.1/2 i
B.1/2
C.-3/2 i
D.-3/2
D、-3/2
第3题
设z=[sin(2π/3)+icos(2π/3)]2,i是虚数单位,则argz等于 ()
A.π/3
B.2π/3
D.4π/3
D.5π/3
第10题
设二维随机变量(X,Y)的概率密度为
求:(I)(X,Y)的边缘概率密度fX(x),fY(y);
(II)Z=2X-Y的概率密度fZ(z);
(III)P{Y≤1/2|X≤1/2}.