Dasar - Dasar Matematika (26)
Oleh : Suryadi
Director of Education Apenso Indonesia
Hukum asosiasi gabungan himpunan ( A U B ) U C = A U ( B U C )
Untuk jelasnya perhatikan gambar di bawah.
Pada gambar di atas daerah yang diarsir ( A U B ) U C = A U ( B U C )
Jadi, ( A U B ) U C = A U ( B U C )
Contoh :
A = { 2, 3, 4 }
B = { 3, 4, 5, 6 }
C = { 3, 4, 5, 6, 7 , 8 }
Maka, ( A U B ) U C = [ { 2, 3, 4 } U { 3, 4, 5, 6 } ] U { 3, 4, 5, 6 , 7, 8 }
= { 2, 3, 4, 5, 6 } U { 3, 4, 5, 6, 7, 8 }
= { 2, 3, 4, 5, 6, 7, 8 }
A U ( B U C ) = { 2, 3, 4 } U [ { 3, 4, 5, 6 } U { 3, 4, 5, 6, 7, 8 } ]
= { 2, 3, 4 } U { 3, 4, 5, 6, 7, 8 }
= { 2, 3, 4, 5, 6, 7, 8 }
Jadi, ( A U B ) U C = A U ( B U C )
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