Considere os conjuntos a seguir:A = { 3, 4, 5, 6, 7} e B = {5, 6, 7, 8, 9 ...},
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| A U B |
|_____ |
a){5, 6, 7}
b){3, 4, 5, 6, 7, 8, 9, ...}
c){3, 4}
d){8, 9, ...}​