1.

What is the proper fraction and polynomial form of the improper rational transform
X(z)= ( frac{1+3z^{-1}+ frac{11}{6} z^{-2}+ frac{1}{3} z^{-3}}{1+ frac{5}{6} z^{-1}+ frac{1}{6} z^{-2}} )?

A. 1+2z<sup>-1</sup>+ ( frac{ frac{1}{6}z^{-1}}{1+ frac{5}{6} z^{-1}+ frac{1}{6} z^{-2}} )
B. 1-2z<sup>-1</sup>+ ( frac{ frac{1}{6} z^{-1}}{1+ frac{5}{6} z^{-1}+ frac{1}{6} z^{-2}} )
C. 1+2z<sup>-1</sup>+ ( frac{ frac{1}{3} z^{-1}}{1+ frac{5}{6} z^{-1}+ frac{1}{6} z^{-2}} )
D. 1+2z<sup>-1</sup> ( frac{ frac{1}{6} z^{-1}}{1+ frac{5}{6} z^{-1}+ frac{1}{6} z^{-2}} )
Answer» B. 1-2z<sup>-1</sup>+ ( frac{ frac{1}{6} z^{-1}}{1+ frac{5}{6} z^{-1}+ frac{1}{6} z^{-2}} )


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