A linear time invariant system is characterized by the system function – McqOptions

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1.	A linear time invariant system is characterized by the system function H(z)=1/(1-0.5z^-1 )+2/(1-3z^-1 ).What is the h(n) if the system is anti causal?
A.	(0.5)<sup>n</sup>u(n)+2(3)<sup>n</sup>u(n)
B.	(0.5)<sup>n</sup>u(-n-1)-2(3)<sup>n</sup>u(-n-1)
C.	-[(0.5)<sup>n</sup>+2(3)<sup>n</sup>]u(-n-1)
D.	(0.5)<sup>n</sup>u(n)-2(3)<sup>n</sup>u(-n-1)
Answer» D. (0.5)<sup>n</sup>u(n)-2(3)<sup>n</sup>u(-n-1)

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