Question

Determine A ∪ B, A ∩ B e A - B, sabendo que A = {x ∈ N l 2 ≤ x < 9} e
B = {x ∈ N l x ≤7 }.

Answer 1

A={2,3,4,5,6,7,8}
B={0,1,2,3,4,5,6,7} ;
a)AUB={0,1,2,3,4,5,6,7,8}
b) A interB= {2,3,4,5,6,7}
c) A-B= {8}. Espero ter ajudado!