Q:

How can a cascade connected discrete time system respresented?

A) y[n] = x[n] + t[n] + r[n] B) y[n] = x[n] * t[n] * r[n]
C) y[n] = x[n] * t[n] + r[n] D) y[n] = x[n] + t[n] * r[n]
 

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