Page 24 - E-MODUL RELASI DAN FUNGSI BY INDAH PRISTY YENZI

FUNGSI DAN BUKAN FUNGSI

Contoh 1

Diketahui himpunan U = {1,2,3,4} dan himpunan V = {b,c,d}.

Berikut ini merupakan contoh Fungsi dan bukan Fungsi

Contoh fungsi: Contoh bukan fungsi :

1.{(1,b), (2,b), (3,b), (4,c)} 1.{(2,b), (2,c), (3,b)}

2.{(1,b), (2,c), (3,c), (4,d)} 2.{(1,b), (2,b), (2,c)}
3.{(1,c), (2,c), (3,c), (4,d)} 3.{(2,d), (3,c), (3,d), (4,c)}

4.{(1,d), (2,b), (3,c), (4,c)} 4.{(3,b), (3,c), (3,d)}

5.{(1,c), (2,c), (3,d), (4,d)} 5.{(3,c), (4,c), (4,d)}
6.{(1,d), (2,c), (3,b), (4,d)} 6.{(1,c), (2,b), (4,d)}

Contoh2

Perhatikan Contoh dan Bukan Contoh fungsi- fungsi dari himpunan
A = {1, 2, 3} ke himpunan B = {a , b} berikut.

Contoh fungsi: Contoh bukan fungsi :

1. {(1 , a), (2 , a), (3 , a)} 1. {(1 , a), (2 , a), (2 , b)}

2. {(1 , b), (2 , b), (3 , b)} 2. {(1 , b), (2 , b), (2 , b)}
3. {(1 , a), (2 , a), (3 , b)} 3. {(1 , a), (1 , b), (3 , b)}

4. {(1 , a), (2 , b), (3 , a)} 4. {(2 , a), (2 , b), (3 , a)}

5. {(1 , a), (2 , b), (3 , b)} 5. {(2 , a), (2 , b), (2 , c)}
6. {(1 , b), (2 , a), (3 , a)} 6. {(1 , b), (2 , a), (2 , b)}

7. {(1 , b), (2 , b), (3 , a)} 7. {(3 , a), (3 , b), (3 , c)}

8. {(1 , b), (2 , a), (3 , b)} 8. {(1 , b), (2 , a), (3 , b)}

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