Discrete-time-Signal-Processing-Solution
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Correct error in 3.17
Hello, i made one adjust in one question of your material. O question 3.17, there was four possibles ROC for H(z), this ROC was:

But i see one erro here: It isn't possible exist one disjoint ROC (such as in item d) ). I make this assertment based in the book of oppenheim (4 th, page 111). See the figure bellow

So the last response of h[n] is impossible because this ROC is disjoint
Do you agree?
I believe that it is correct as is (originally). The "or" is not suggesting the union of those two regions, rather simply that h[n] would have the same form whether it was given that |z| > 2 or if it was given that |z| < 1/2.