6. (A∩B) UC.

А = {1; 3; 4; 6; 8; 10}, B = {3; 7; 8; 10}, C{4; 8; 11}.

Найдем A∩B = {3,8,10}.

Теперь найдем (A∩B) UC.

(A∩B) UC = {3, 8, 10} U {4, 8, 11} = {3, 4, 8, 10, 11}

Ответ: {3, 4, 8, 10, 11}