Question

Jika S={bilangan asli kurang dari 20}
A={x|x lebih dari 7 ,bilangan yang habis dibagi 3,x elemen S}dan
B={y|y bilangan ganjil,x elemen S},n (A u B)adalah...
#pakai cara

Answer 1

S={1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20}
A={9,12,15,18}
B={3,5,7,9,11,13,15,17,19}
AUB={3,5,7,9,11,12,13,15,17,18,19}

Answer 2

S= {1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19}
A= {9,12,15,18}
B= {1,3,5,7,9,11,13,15,17,19}

A u B= {1,3,5,7,9,11,12,13,15,17,18,19}
n (A u B)= 12

Jadi, n (A u B) adalah 12.