(a) Is the following statement true or false The series interconnection of two linear

Chapter 1, Problem 1.42

(choose chapter or problem)

(a) Is the following statement true or false? The series interconnection of two linear time-invariant systems is itself a linear, time-invariant system. Justify your answer. (b) Is the following statement true or false? The series interconnection of two nonlinear systems is itself nonlinear. Justify your answer. (c) Consider three systems with the following input-output relationships: System 1: y[n] = { x[n/2], 0, n even n odd ' System 2: 1 1 y[n] = x[n] + 2x[n- 1] + 4x[n- 2], System 3: y[n] = x[2n]. Suppose that these systems are connected in series as depicted in Figure P1.42. Find the input-output relationship for the overall interconnected system. Is this system linear? Is it time invariant? y[n]

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