问题描述：
求二维联合概率密度函数
具体题目如下：（英文的,
Suppose that a point (X,Y) is chosen at random from the rectangle S defined as follows:
S={(x,y):0
具体题目如下：（英文的,
Suppose that a point (X,Y) is chosen at random from the rectangle S defined as follows:
S={(x,y):0
问题解答：
我来补答
随机取就是每点被取到可能性相同,是均匀分布
如图,有不清楚请追问.请及时评价.
如图,有不清楚请追问.请及时评价.
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