Which of the following is a causal system? – McqOptions

MCQOPTIONS

1.	Which of the following is a causal system?
A.	y(n) = 3x(n) – 2x(n-1)
B.	y(n) = 3x(n) + 2x(n+1)
C.	y(n) = 3x(n+1) + 2x(n-1)
D.	y(n) = 3x(n+1) + 2x(n-1) + x(n)
Answer» B. y(n) = 3x(n) + 2x(n+1)

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