Question: Prove A B b a r ( A ) = A . A b a r ( B ( ? b a r ( A

Prove ABbar(A)=A.
Abar(B(?bar(A)))=A(?bar(B)bar(?bar(A)))
=A(?bar(B)A)
=A(Abar(B))
=A
Prove A B b a r ( A ) = A . A b a r ( B ( ? b a r

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