E（x-y)=E（x）-E(y)两个随机变量差的期望等于这两个随机变量的期望的差
(e.g., Trisomy 21) to minimize confusion about the potential prognosis. The use of colloquial terms such as ‘female’ or ‘male’ chromosomes in explanations of genetic etiology can also be confusing. It is preferable to use terms such as ‘extra x’ or ‘extra y’ when communicating ...
E(X-Y)=EX-EY=1-0=1
main .github bin config database logger media util v2ui web xray .gitignore Dockerfile LICENSE README.md go.mod go.sum install.sh main.go x-ui.service x-ui.sh Breadcrumbs x-ui-en / go.sum Latest commit Cannot retrieve latest commit at this time. ...
Signals not enabled for storage cannot be part of the Storage Qualifier condition
E(X-Y)=EX-EY=2-(-2)=4;E(X-Y)^2=E(X^2+Y^2-2XY)=EX^2+EY^2-2EXEX=[(EX)^2+DX]+[(EY)^2+DY]-2*2*(-2)=[4+2]+[4+4]+8=22
5H5ItdFunvoo7wGw6E4+YQKS2jJYTrWn/3LPAxioxQNmA5OZW0OX27HlXaWHN/sO6Oh4+hyr26/i +azKcn3Q6dVxREegzrrafLyqmvZcLfCJegru/iy5W79Xsg+qthgrvZjnL25tD9Aith/6oXRcwMUi 9S/u5+L2Y8txUys5/MQ2+rSwtVB/Lc/nqxpfZfbtc2jR2dRX3e057gFpMW6a0FUqIPdZKrEUfRVg d6514k0Awzb3tJCvUL8Uzz33ZhSXFdgfmm...
因为不能确定绝对值的正负，如果为正则可以是EX-EY,如果为负则是EY-EX
k1eVW4ymDHfbbq7YncrLWy++YvdunceAVrm 586MN7gTtaRmIH4sUpl6waouIi6B7um6q4/gTjx4aPSlZQxt3hF/JTaeFeJYsRjFFjiyYMtGx8jj XVLD+MiQ/qFZMKh/OPog/SVf8kKUb4yXKrx8B9smkSfwlfIXfYX5tTZPdsVXypnhxSlqB+13Dqo1 T5uh3UGxFlNpPha1du7JnHroWSDj/K21wNxN3ZRGaPm62PZ3RoviZLEEFFEwT3cmvSpnIEwWRpTt Ey6...
【答案】：方程两边同时微分，得exdx-eydy=ydx+xdy整理，得 (x+ey)dy=(ex-y)dx即