Question

Sendo A = {5, 7, 9} , B = {0, 9, 10, 90 } , C= {7,8,9,10}, D= {9,10} e E = { 5,7,10,90 }, determine:
a) a U b
b) a U b U c
c) d U e
d) c U e

Answer 1

a) AuB= {0, 5, 7, 9, 10, 90}

b) AuBuC= {0, 5, 7, 8, 9, 10, 90}

c) DuE= {5, 7, 9, 10, 90}

d) CuE= { 5, 7, 8, 9, 10, 90}

Espero ter ajudado ^^