Question

- Questão 52 - Sendo A = {1, 2, 3, 5, 7, 8} e B = {2, 3, 7}, então o complementar de B em A é: A) {8} C) {9, 10, 11...} B) {8, 9, 10} D) {1, 5, 8}​

Answer 1

$\large\boxed{\begin{array}{l}\underline{\sf D~\!\!efinic_{\!\!,}\tilde ao\,de\,complementar}\\\rm Dado\,dois\,conjuntos\,A\,e\,B\\\rm o\,complementar\,de\,A\,em\,relac_{\!\!,}\tilde ao\,a\,B\\\rm \acute e\, C_B^A=B-A\\\sf \end{array}}$

$\large\boxed{\begin{array}{l}\rm A=\{1,2,3,5,7,8\}~~B=\{2,3,7\}\\\rm C_A^B= A-B\\\\\rm C_A^B=\{1,2,3,5,7,8\}-\{2,3,7\}\\\\\rm C_A^B=\{1,5,8\}\\\green{\huge\boxed{\boxed{\boxed{\boxed{\rm\dagger\red{\maltese}~\blue{alternativa~D}}}}}}\end{array}}$