If A and B are two sets, then ((A’ ∪ B’) – A)’ is equal to……….
Solution
\[ ((A’ \cup B’) – A)’ \]
Using
\[ X – Y = X \cap Y’ \]
we get
\[ = ((A’ \cup B’) \cap A’)’ \]
Since
\[ A’ \cap (A’ \cup B’) = A’ \]
therefore,
\[ = (A’)’ \]
\[ = A \]
Answer
\[ \boxed{A} \]