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Homework Statement
The joint PDF (probability density function) ##p_{X,Y}(x,y)## of two continuous random variables by:
$$ p_{X,Y}= Axy e^{-(x^2)}e^{\frac{-y^2}{2}}u(x)u(y)$$
a) find A
b) Find ##p_X (x), \ p_{y}, \ p_{X|Y}(x|y), and \ p_{Y|X}(y|x)##
Homework Equations
The first coulpe pages of this presentation has some information on this form. http://berlin.csie.ntnu.edu.tw/Courses/Probability/2011Lectures/PROB2011F_Lecture-09-Continuous%20Random%20Variables%20-Conditioning,%20Expectation%20and%20Independence.pdf
The Attempt at a Solution
Im stuck on part A. This is somewhat similar to my last question in a previous thread. I just don't see how to solve for A. My textbook has some examples of very similar form but the contant A is not present. I am not sure why they provide an example one way and then ask questions of a different way. To spark your thinking I guess.
I do know I have to mess around with some double integrals and what not but I need to resolve the unknown constant A first.
Any hints are greatly appreciated!
Thanks!