8,9, 10,14

Level 2 Use truth tables in Problems 7-14 to determine whether the given compound statement is a tautology. 7. ( p / q) V ( p - ~q) 8. ( p V q) (q -> ~p) 9 . ( ~p -> q ) -p 10 . ( ~ q - p) - q 11. (p / q) (pVq) 12. (p V q) (qVp) 13. (p -> q) (~pvq) 14. ( p V ~ q) ( ~PV q)