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Find and Express the Z Transform as a Rational Function

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June 18th, 2023

For the following expression:

x(n) = 3 (0.75)^n cos(0.3 pi n)u(n) + 4 (0.75)^n sin(0.3 pi n) u(n),

Please calculate and express the Z transform as a rational function Z^-1 and work out the ROC.

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