a linear time-invariant discrete-time system, x[n] is the input and y[n] is the output. Unit at the entrance of the system When initial conditions are zero when step (u[n]) is applied y[n] = 3(1/2)^n  It is known that u[n] is output. Accordingly, create the transfer function of the system and find the unit sample answer for this system. (h[n]=?) Reminder: This question also covers z-transformation and inverse z-transformation.

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