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Aim_ How can we review logic proofs for the upcoming regents exam_

VIEWS: 26 PAGES: 7

									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- PQ
                                      -Q
                                      -P
3. Law of Detachment- PQ
                           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- PQ
               QR
              PR
      Practice Proof
1.
AB      Statement     Reason
-B
-A
            Practice Questions
         (You can work in groups)
1. DE                 3. PS
   EF                    P
     D                -S∨P
     F                      P
2. Y∨Z                 4. HI
    -Z                    IJ
 W-Y                     Jk
   -W                     HK
   Practice Questions (Continued)
5. M∨N              7. –A-B
  -M                    -A
   L-N                 CB
     -L                    -C
6. UV              8. ST
    U∨T                 TU
      -V                UV
           T            VW
                        WX
                         XY
                        -Y
                        -S
          Homework
1. AB     Statement   Reason
  -A-C
     -B
     -C

2. RS     Statement   Reason
   S T
     -T
   R ∨U
      U

								
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