What is the frequency response of the system described by the system f – McqOptions

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1.	What is the frequency response of the system described by the system function H(z)= ( frac{1}{1-0.8z^{-1}} )?
A.	( frac{e^{j }}{e^{j }-0.8} )
B.	( frac{e^{j }}{e^{j }+0.8} )
C.	( frac{e^{-j }}{e^{-j }-0.8} )
D.	None of the mentioned
Answer» B. ( frac{e^{j }}{e^{j }+0.8} )

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