Question

Se A= {1,3,5,7}, A=
Se A= (3,4,5) e B= {7,8}, A U B=

Answer 1

Boa tarde!

Solução!

$A\cup B\\\\ A\cup B$

$\{1,3,5,7\}\cup\{7,8\}=\{1,3,5,7,8\}\\\\\\\ \{3,4,5\}\cup\{7,8\}=\{3,4,5,7,8\}$

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Bons estudos!