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1. Is the formula (p q) p , a tautology, satisfiable, or contradictory? 2. Show that the formula (p q) (p q) is a tautology.

1. Is the formula (p q) p, a tautology, satisfiable, or contradictory?

2. Show that the formula (p q) (p q) is a tautology.

3. Show that the formula p q and the formula (p q) are logically equivalent.

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