VIEWS: 26 PAGES: 7 POSTED ON: 8/15/2012
Aim: How can we review logic proofs for the upcoming regents exam? Homework- Logic proof questions (2) Do Now- Name three reasons used when solving a logic proof Laws of Logic 1. Law of Contrapositive- P Q -Q -P 2. Law of Contrapositive Inference- PQ -Q -P 3. Law of Detachment- PQ P Q Laws of Logic (Continued) 4. Law of Disjunctive Inference- P∨Q P∨Q -P -Q Q P 5. Demorgan’s Law -(P∧Q)=(-P) ∨(-Q) -(P∨Q)=(-P) ∧ (-Q) 6. Chain Rule- PQ QR PR Practice Proof 1. AB Statement Reason -B -A Practice Questions (You can work in groups) 1. DE 3. PS EF P D -S∨P F P 2. Y∨Z 4. HI -Z IJ W-Y Jk -W HK Practice Questions (Continued) 5. M∨N 7. –A-B -M -A L-N CB -L -C 6. UV 8. ST U∨T TU -V UV T VW WX XY -Y -S Homework 1. AB Statement Reason -A-C -B -C 2. RS Statement Reason S T -T R ∨U U
"Aim_ How can we review logic proofs for the upcoming regents exam_"