$X(z)=\frac{1+z^{-1}}{1-z^{-1}+0.5 z^{-2}}$ $X(z)=\frac{1}{\left(1+z^{-1}\right)\left(1-z^{-1}\right)^{2}}$

Subject : Signals and Systems

Topic : Frequency Domain Analysis of Discrete Time System using Z Transform

Difficulty : Medium