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Other Subjects - 8366092.pdf

Q7: X (z ) = 1 + 2 z − 1 + z − 3
Comparing it with general form,
X (z ) = · · · + x[−2]z 2 + x[−1]z 1 + x[0] + x[1]z −1 + x[2]z −2
Thus, x(n) = {. . . , 0, 0, 1, 2, 1, 0, 0, 0, . . ....

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