Question: 3. Proof using properties (a) Use propositional logic properties to prove that the following propositions are tautologies (without using truth tables): 1. (p V q)

3. Proof using properties (a) Use propositional logic properties to prove that the following propositions are tautologies (without using truth tables): 1. (p V q) V (p V-q) (b) Use propositional logic properties to prove that the following propositions are contradictions (with- out using truth tables)
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