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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. | |