(adsbygoogle = window.adsbygoogle || []).push({}); can we simply truncate a Fourier series if it is divergent??

given a Fourier series of the form

[tex] \sum_{n=0}^{\infty}\frac{cos(nx)}{\sqrt{n}}[/tex]

can i simply truncate this series up to some number finite N so i can get finite results ?? thanks.

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# Can we simply truncate a Fourier series if it is divergent?

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