September 2018 1 7 Report
Tolong bantu ya♥

1) Relasi dari himpunan A = {1,2,3,4} ke himpunan B = {a,b,c,d} dinyatakan dengan himpunan pasangan berurutan berikut.
(i) {(1,a), (1,b), (2,c), (2,d)}

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

(iii) {(1,b), (2,b), (3,b), (4,b)}

(iv) {(1,a), (2,b), (2 ,c), (4,d)}

Di antara relasi relasi di atas yg merupakan pemetaan adalah...

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