Question

A = {x £ ℤ : x =< 3 ou 7 =< x}, B = { x £ ℕ : -2 =< x =< 10} e C = {x £ ℤ : -3 < x =< 8}.

a) Defina por listagem o conjunto A n B e represente a resposta na reta numérica. b) Defina por propriedade o conjunto A u C e represente a resposta na reta numérica.

Answer 1

                    ___-3__-2_-1__0_1_ 2_  3_________7__8___9__10___
A                -∞ ******************************                    *********************+∞
B                               *************************************************
C                       ⊕******************************************
A ∩ B                        ********************                   ****************
A ∪ C         -∞*****************************************************************+∞