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A 1.6kHz periodic (not sinusoidal) signal contains all its harmonics, both even and odd. The signal is sampled at 3.6kHz and ideally reconstructed. What frequencies are present in the output?

I know that for a sinusoidal wave aliasing occurs, and assuming that the sample is reconstructed at 7.2kHz, the frequencies present would be [(k7.2)+1.6]kHz or [(k7.2)-1.6]kHz where k is an integer. But how do we calculate the same for a non-sinusoidal signal with harmonics? Does the presence pf harmonics change this answer.

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