It can be shown (see Problem 3.50) that if x[n] = 0 for n < 0, then
This result was called the initial value theorem for right-sided sequences.
(a) Prove a similar result for left-sided sequences, i.e., for sequences such that x[n] = 0 for n > 0.
(b) Use the initial value theorems to prove that if x[n] is a minimum-phase sequence.
(c) Use the initial value theorems to prove that if x[n] is a maximum-phase sequence.
(d) Use the initial value theorems to prove that when X(z) is given by Eq. (13.32). Is this result consistent with the results of parts (b) and (c)?
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