Question

sendo A={1,2,3,4,5} B={2,3,7} c={2,4,6} determine AUB

Answer 1

Bom Dia 

AUB = {1,2,3,4,5,7}

Duvidas?! é só comentar

Answer 2

Sendo A={1,2,3,4,5} B={2,3,7} c={2,4,6} determine 
AUB = {1,2,3,4,5,7}