Question: ( i - 2 0 pts ) Prove the following: ? b a r ( A ) ( A B ) ? b = a

(i -20pts) Prove the following:
?bar(A)(AB)?b=ar(A)B
?bar(A)(AB)?b=ar(A)B
if AsubeB then ?bar(B)subebar(A)
A-(B-A)=A
( i - 2 0 pts ) Prove the following: ? b a r ( A

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