3 2 d A LTI system has the following system function 4 2 4 2 1 z z z H The

3 2 d a lti system has the following system function

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3 2 d) A LTI system has the following system function: 4 2 4 2 1 ) ( = z z z H The input sequence to this system is: ) 4 2 cos( 20 ] [ 20 20 ] [ + + = n n n x for - ∞ < n < ∞. Determine the output expression of the system (y[ n ]) that corresponds to the above input x[ n ] that is valid for all n . 10 Total 25
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