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Last edited by Porter1; December 1st 2009 at 06:31 AM.
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You have the joint density of Y1 and Y2. Let W=Y1 and find the joint density of W and U. (That's calc3, jacobians.) Then integrate out the unnecessary rv W. And start showing your work here. The other one is calc1
Not quite sure what you are talking about.
You should review calc3, change of variables. Look at jacobians and the examples of polar, cylindrical and spherical coordinates
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