If, A = {1,2,3,4} then A − A = _____?
- {1,2,3,4}
- {0,5}
- {}
- None of these
Explanation
Step 1: Recall the definition of set difference
The set difference A - B is the set of elements that are in A but not in B.
Step 2: Calculate A - A
A = {1,2,3,4}
A - A = {} (since every element in A is also in A, the difference is the empty set)
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