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f1 = 438 Hz
f2 = 442 Hz
Dit:
a. Frekuensi rata2
b. Frekuensi layangan
jawab:
a.
frekuensi rata2 = (438+442)/2 = 440 Hz
b.
frekuensi layangan = f2 - f1 = 442 - 438 = 4 Hz