Question

Dados os conjuntos A = {1, 2, 3, 15} e B = {1, 2, 5, 7} assinale a alternativa correta.

a) A U B = {3, 15}
b) A ∩ B = {1, 2, 3}
c) A ∩ B = {1, 2, 5}
d) (A U B) ∩ A = {1, 2, 3, 15}

Answer 1

Resposta:

letra d

Explicação passo-a-passo:

(1,2,3,5,7,15)uA

1,2,3,15

Answer 2

$\huge\mathsf{A=\{1,2,3,15\}}\\\mathsf{B=\{1,2,5,7\}}$

$\huge\mathsf{A\cup\,B=\{1,2,3,5,7,15\}}$

$\huge\mathsf{A\cap\,B=\{1,2\}}$

$\huge\mathsf{(A\cup\,B)\cap\,A=\{1,2,3,15\}}$

$\huge\mathsf{Alternativa\,d}$