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Tagged with asymptotics divergent-series
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The divergent sum $\sum_{n=1}^\infty (-1)^n (n^2)! x^n$
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I'm interested in assigning a value to the divergent series $F(x)=\sum_{n=1}^\infty (-1)^n (n^2)! x^n$. I'm hoping that (1) the definition for $F(x)$ has (one-sided) derivatives of $(-1)^n (n^...
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Term-wise expectation of the Taylor series for $1/X$ yields asymptotic expansion for $\mathsf EX^{-1}$. What are the conditions?
Migrated from the MSE.
Let $X\sim F_X$ denote a continuous random variable. Computing the first negative moment $\mathsf EX^{-1}$ (assuming it exists) may not be tractable and thus a common tactic is ...
