Unit step response of the system described by the equation y(n) +y(n-1 – McqOptions

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1.	Unit step response of the system described by the equation y(n) +y(n-1) =x(n) is:
A.	z2/(z+1)(z-1)
B.	z/(z+1)(z-1)
C.	z+1/z-1
D.	z(z-1)/z+1
Answer» B. z/(z+1)(z-1)

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