Question: * find z-transform for -4 x (n) = {21 2 3} x(z) = 2 + z-1 + 2z=2 + 32-3 = (2) = 2z2 +5

* find z-transform for -4 x (n) = {21 2 3} x(z) = 2 + z-1 + 2z=2 + 32-3 = (2) = 2z2 +5 + z-' + 2 + 3Z O 4 1 x(2) = 273 + 2 + 2 + 3 -3 + 2 + + 272 = (2)x
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