# Lecture Slide Problem

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Can somebody explain how to do this problem.  I am pretty sure when the substitute was there he went over this and said the answer was 172 Hz.  I thought he said all you have to do is subtract the adjacent frequencies given and that is the fundamental frequency (which would be 172), but I do not understand why you divide that by 2, and that is the correct answer.

asked Nov 12, 2014 in General