Question: A causal LTI system is described by the difference equation y [ n ] = y [ n - 1 ] + y [ n

A causal LTI system is described by the difference equation
y[n]=y[n-1]+y[n-2]+x[n-1]
Find (a) System function for this system and (b) Unit impulse response of the system.
A causal LTI system is described by the

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