Tuesday, 24 October 2017

calculus - What is the sum of the series $sumlimits _{k=1}^infty frac{1}{k^2}$?







What is $\lim \limits_{n\to\infty} \sum\limits_{k=1}^n \frac{1}{k^2}$ as an exact value?

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real analysis - How to find $lim_{hrightarrow 0}frac{sin(ha)}{h}$

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