Question: The flow graph shown in Figure is noncomputable; i.e., it is not possible to compute the output using the difference equations represented by the flow

The flow graph shown in Figure is noncomputable; i.e., it is not possible to compute the output using the difference equations represented by the flow graph because it contains a closed loop having no delay elements.

x[n) yIn] b. a -1

(a) Write the difference equations for the system of Figure, and from them, find the system function of the network.

(b) From the system function, obtain a flow graph that iscomputable.

x[n) yIn] b. a -1

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