设随机变量的概率密度函数为f(x,y)=Asin(x y),求EX
也许感兴趣的知识
-
Her sister has become a lawyer,_____she wanted to be.
-
有谁知道 Last year,he often ＜＞ at home and ＜＞ TV 括号里的怎么填?是用过去式还是
-
Welcome to the weather office!神马意思?
-
Gina is a careless girl.She always______to bring her homewor
-
They have waited here for half an hour的同义句
-
The pen I ___I___is on my desk.A.thought;have lost B.thought
-
西门子数字量 8点24V DC 输入
-
一根铁丝,第一次剪去全部的1/4,第二次剪去比剩下的2/3少2米,结果还剩12米,这根铁丝有多少米?
-
树欲静而风不止 什么意思?
-
照样子写拟人句小溪淙淙走下山崖.阳光大海黄昏春天帮帮忙~~~~~~~~~
-
镇南关起义和黄花岗起义,孙中山都参加了吗?
-
小亮从镜子里看到钟表的时间按正常读是2:30,实际是__
-
（ ）米比12米长1/4,15千克比（ ）千克轻2/5,比（ ）吨少20%是32吨
-
A good habits作文
-
人类的终极走向及其哲学依据分别是什么?
