D(aX+E(x^2)-DX)=
问题描述:
D(aX+E(x^2)-DX)=
答
注意E(x^2)和DX均为常数
D(aX+E(x^2)-DX)=DaX=a²DX
D(aX+E(x^2)-DX)=
注意E(x^2)和DX均为常数
D(aX+E(x^2)-DX)=DaX=a²DX