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  3. 2 show the followings 10 2 20pts a determine whether...

Question: 2 show the followings 10 2 20pts a determine whether...

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2. Show the followings: (10 2-: 20pts) (a) Determine whether (-а Л (a b)) -b is a tautology (Without using Truth table) (b) Show that (a ->b) v (a -c and a -> (bVc) are logically equivalent. (Without using Truth table)

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