For each of the signals given, determine mathematically if the signal is even, odd, or neither. Sketch the waveforms to verify your results.
(a) x(t) = –4t
(b) x(t) = e–|t|
(c) x(t) = 5 cos 3t
(d)
(e) x(t) = u(t) – u(–t)
(f) x(t) = –u(t – 1) + u(– t – 1)
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