1.

Which of the following equations holds true for the following signal flow graph?

A. x2 = A21x1 + A23x3
B. x2 = A21x1 + A22x2
C. x4 = A41x2 + A43x3
D. x3 = A31x1 + A23x2 + A33x3
Answer» B. x2 = A21x1 + A22x2


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