Jawabanmu

2014-09-10T17:47:42+07:00
A=[1,2,3,4,5]
B=[4,5,6,7,8]
C=[3,5,7,9]

maka B irisan C = 4, 6, 8

Jadi A union B irisan C = 1, 2, 3, 4, 5, 6, 8.