1.

Find the Z-transform of x(n) = ( ( frac{1}{2} ))n u(n)*( ( frac{1}{4} ))n u(n).

A. ( frac{z}{z-(1/2)} frac{z}{z-(1/4)} )
B. ( frac{z}{z-(1/2)} + frac{z}{z-(1/4)} )
C. ( frac{z}{z+(1/2)} * frac{z}{z-(1/4)} )
D. ( frac{z}{z-(1/2)} frac{z}{z+(1/4)} )
Answer» B. ( frac{z}{z-(1/2)} + frac{z}{z-(1/4)} )


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