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Iam just learning the z-transform for discrete signals and I can't get my head around the Region of covergence (ROC).

As far as I have understood describes the ROC if the z-transform excists or not ?

But how to I actually calculate it? Is there any kind of formula?

I all examples I found they never show howto actually get to the solution.

Thanks in advance,

kind regards,

Mike

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# Region of convergence Z-transform

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