Tóma mengið, sammengi og sniðmengi – Æfing 1 -Svör

  1. A∪B = {1,2,3,4,5,6,7} og A∩B = {1,2,3}
  2. A∪B = {1,2,3,4,5,6,7,8}, B∪C = {1,2,3,4,5,6,7,8,9}, A∪B∪ = {1,2,3,4,5,6,7,8,9}, A∩B = A = {2,3}, A∩C = {1}, A∩B∩C = {} = Ø
  3. A∪B = {1,2,3,4,5,6,7,8,10,11}, B∪C = {1,5,7,8,9,10,11} A∪B∪ = {1,2,3,4,5,6,7,8,9,10,11}, A∩B = {} = Ø, A∩C = {1}, A∩B∩C = {} = Ø
  4. A∪B = {1,4,5,6,9,10,11}, B∪C = {5,9,10,11} A∪B∪ = {1,4,5,6,9,10,11}, A∩B = {} = Ø, A∩C = {5,9}, A∩B∩C = {} = Ø