Jika operasi * terhadap bilangan rasional positif didefinisikan sebagai a * b = ab/a+b, maka 3*(3*3) =
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Operasi * => a * b = ab/a+b
3*(3*3)
3*3 =
= 9 / 6 = 2/3
3 * (2/3) =
=
= 2 / (11/3)
= 6/11