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n= 2 1/4= 9/4
t= 2 s
ditanya :
a.) F.... ?
b.) T....?
jawab :
a.) F = n/t
= 9/4 : 2
= 2,25 : 2
= 1,125 Hz
b.) T= t/n
= 2 : 9/4
= 2 : 2,25
= 0,888888889
= 0,89 s
jadi jawabanya adalah C