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Practice Question on Computing the z-transform

Compute the z-transform of the following signal.

$ x[n]=u[-n] $


Share your answers below

Prof. Mimi gave me this problem in class on Friday, so I'm posting it and my answer here. --Cmcmican 22:09, 16 April 2011 (UTC)


Answer 1

$ X(z)=\sum_{n=-\infty}^\infty u[-n]z^{-n} $

let k=-n

$ =\sum_{k=0}^\infty z^{k} $

$ X(z)=\frac{1}{1-z} \mbox{, ROC: }\Big|z\Big|<1 $

--Cmcmican 22:09, 16 April 2011 (UTC)

Answer 2

Write it here.

Answer 3

Write it here.


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