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I am an exmathematician who still enjoys solving math problems. Here is a selection of my answers:
Does the sum $\sum_{n \geq 1} \frac{2^n\text{ mod } n}{n^2}$ converge?
Expected absolute difference between two i.i.d. variables
Does the sequence $x_{n+1} = 16 + 6x_n + \frac{12}{x_n}$ converge?
Proving $\lim_{x \to 0+} \sum_{n=0}^\infty (1)^n/(n!)^x = \frac{1}{2}$
Solution of the functional equation $f(x) + f(y) = f(x + y + 2f(xy))$
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Yearling
× 2Nov 16, 2020
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AutobiographerNov 8, 2016
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