The conditions are the same, but my task is to find covariance matrix. I only noticed that density function is symmetric so expected values, variance are also the same. But I don't know how to find covariance, variance in my case. I will be grateful for some ideas or tips.
2026-03-28 03:58:47.1774670327
Find covariance matrix of $\frac{f(x + y) }{x + y}$ function
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