If input x[n] = [1, 4, 7] and output is y[n] = [-1, -4], then system d – McqOptions

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1.	If input x[n] = [1, 4, 7] and output is y[n] = [-1, -4], then system difference equation is ______
A.	y[n] + 4y[n - 1] + 7y[n - 2] = x[n] + 4x[n - 1]
B.	y[n] + 4y[n - 1] + 7y[n - 2] = -x[n] – 4x[n - 1]
C.	y[n] – 4y[n - 1] – 7y[n - 2] = x[n] + 4x[n - 1]
D.	-y[n] – 4y[n - 1] + 7y[n - 2] = x[n] + 4x [n - 1]
Answer» C. y[n] – 4y[n - 1] – 7y[n - 2] = x[n] + 4x[n - 1]

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