Difference equation DSP

Thread Starter

josh007

Joined Sep 20, 2015
43
Hi, I just need some explanation on the below question:
upload_2017-7-16_19-15-9.png

based on the principles in my text book I did the below:
(zY(z) -zy0) - 0.5Y(z) = 2(0.25)(0.25)^n (zU(z) -zu0))

I am very uncertain on what to do here. Do i use the initial conditions y0=0 and u0=0? I am confused where does the u[n+1] as there are no examples like that in my text book.

regards
Josh
 
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