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Contoh Operasi Biner yang Bersifat Komutatif

(a)    Pada R didefinisikan suatu operasi biner # dimana a#b=a+b-1. Operasi ini komutatif karena a # b = a + b – 1 = b + a – 1 = b # a.

(b)   Operasi biner penjumlahan dan perkalian pada R bersifat komutatif. Tetapi operasi biner pengurangan tidak memenuhi kondisi komutatif. Misalnya 5 – 7=  -2, sedangkan 7 – 5=2.

March 8, 2011 - Posted by | matematika

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