What is the symmetric difference AΔBA \Delta BAΔB defined as?
(A∪B)∖(A∩B)(A \cup B) \setminus (A \cap B)(A∪B)∖(A∩B)
(A∩B)∖(A∪B)(A \cap B) \setminus (A \cup B)(A∩B)∖(A∪B)
A∪BA \cup BA∪B
A∩BA \cap BA∩B