Determine expression describing spectrum and time waveform

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A periodic signal consists of the exponentially decreasing wave form e^(-at), 0<t<T, repeated every T seconds. A given signal f(t) is multiplied by this periodic signal. Determine an expression describing the spectrum and the time waveform of the resulting amplitude-modulated signal if all componets except those centered at + Wc, Wc = 2π/T, are discarded?

Reference no: EM13278027

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