Question

Dados os conjuntos A={1,3,4,6}, B={3,5,7,8} e C ={1,5,6,8}, então (A-C) ∩ B é igual a :
a){1,6} b){1} c){3} d){3,7}

Answer 1

$A=\{1,3,4,6\} \\ B=\{3,5,7,8\} \\ C=\{1,5,6,8\} \\ \\ (A-C)\bigcap B= \\ \\ \{3,4\}\bigcap \{3,5,7,8\}=\{3\}~~~~letra~~C$