Determine whether or not each of the following continuous-time signals is periodic. If the signal is periodic, determine its fundamental period. x(t) = 3e^j (t – pi/2) u(t) x(t) = e^j (t – pi/2) x(t) = 3 cos (4t + pi/3) x(t) = sigma_k = -infinity^infinity [Delta (t – 5k) + delta (t – 2 – 5k)]

42 3 - Determine whether or not each of the following continuous-time signals is periodic. If the signal is periodic, determine its fundamental period. x(t) = 3e^j (t - pi/2) u(t) x(t) = e^j (t - pi/2) x(t) = 3 cos (4t + pi/3) x(t) = sigma_k = -infinity^infinity [Delta (t - 5k) + delta (t - 2 - 5k)]

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images - Determine whether or not each of the following continuous-time signals is periodic. If the signal is periodic, determine its fundamental period. x(t) = 3e^j (t - pi/2) u(t) x(t) = e^j (t - pi/2) x(t) = 3 cos (4t + pi/3) x(t) = sigma_k = -infinity^infinity [Delta (t - 5k) + delta (t - 2 - 5k)]

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