Consider the discrete-time signals that follow. For each signal, determine the fundamental period N0 if the signal is periodic; otherwise, prove that the signal is not periodic.
(a) x[n] = ej5πn/7
(b) x[n] = ej5n/2
(c) x[n] = ej2πn
(d) x[n] = ej5n/π
(e) x[n] = cos(5πn/7)
(f) x[n] = ej0.5n
(g) x[n] = ej3πn/1 + ej5πn/9
(h) x[n] = ej3πn/1 + ej0.5πn + cos(5πn/9)
(i) x[n] = ej.3n + ej2πn
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