n-th roots of a complex number

Here one method to find the n-th roots of a complex number

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Convergence of series

Here a list of criteria, methods and examples to compute the convergence or not of series.

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Max and Min in a two variables function

Here one of the easiest way to compute the maximum and the minimum of a function with two variables

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Differential Equations

This is one of the easiest method to compute some differential equations.

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