For \(f_{X,Y}(x, y)\) to be a valid joint density function, it must satisfy two conditions:
- The integral of \(f_{X,Y}(x, y)\) over all possible values of \(x\) and \(y\) must equal 1. This ensures that the total probability is 1.
- \(f_{X,Y}(x, y) \geq 0\) for
Show more…