1.

What is the partial fraction expansion of the proper function X(z)= ( frac{1}{1-1.5z^{-1}+0.5z^{-2}} )?

A. ( frac{2z}{z-1}- frac{z}{z+0.5} )
B. ( frac{2z}{z-1}+ frac{z}{z-0.5} )
C. ( frac{2z}{z-1}+ frac{z}{z+0.5} )
D. ( frac{2z}{z-1}- frac{z}{z-0.5} )
Answer» E.


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