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Michael Rybkin

Apparently, this user prefers to keep an air of mystery about them.

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  • Member for 4 years, 8 months
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  • Last seen Mar 3 at 22:01

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11 Why is this a valid proof for the harmonic series? Apr 30 '19
10 What is $\int\tan^2{x}dx$? what strategy can I use? Feb 1 '19
9 How is the notation $\frac{d}{dx} (f^3)(1)$ interpreted? Nov 12 '18
9 How can I calculate the following difficult limit: $\lim_{x\to\infty} (x + \sin x)\sin \frac1x$? Nov 9 '17
7 Where am I wrong in this algebraic equation? Nov 4 '17
7 Limit involving inverse functions Feb 19 '19
7 Why does limit not exist? May 30 '19
6 Derivative when $(\sqrt{x})^2$ is involved? Jun 27 '19
6 A thorough explanation on why division by zero is undefined? Apr 23 '19
6 Help finding the derivative of $f(x) = \cos{\left(\sqrt{e^{x^5} \sin{x}}\right)}$ Mar 7 '19
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