Practice problem
What is ∅∪{1,2,3,4},\emptyset \cup \{1,2,3,4\},∅∪{1,2,3,4}, where ∅\emptyset∅ is the empty set (the set with no elements)?
{1,2,3,4}\{1, 2, 3, 4\}{1,2,3,4}
1,2,3,41, 2, 3, 41,2,3,4
{∅,1,2,3,4}\{\emptyset, 1, 2, 3, 4\}{∅,1,2,3,4}
∅\emptyset∅
Type a concept, like “slope” or “photosynthesis”.
