Let $f_i, i=1, \ldots, n$ be independent Steinhaus random variables, i.e. variables which are uniformly distributed on the complex unit circle. Let $a \in R^n$.
Find $E\left(\sum_{i=1}^nf_i a_i\right)^{-k}$, for $k=1,2$
2026-04-08 02:31:47.1775615507
Negative moments of variables
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