In the following proof, what is the justification for line 5? 1. P₁ → (P₂V P3) - P3 3. P₁ 4. P₂ P3 5. P₂ P₁ → P₂ ܝܕ ܚܕܐ 2. 6. O OR Elim 4, 2 O -> Elim 1, 3 O assumption O -> Elim 6, 3 premise premise assumption →Elim 1,3 ??? → Intro 3-5

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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In the following proof, what is the justification for line 5?
1.
2.
6.
P₁ → (P₂ V P₂)
- P3
3. P₁
4. P₂ P3
V
5.
P₂
P₁ → P₂
O OR Elim 4, 2
O -> Elim 1, 3
assumption
O -> Elim 6, 3
premise
premise
assumption
→ Elim 1,3
???
→ Intro 3-5
Transcribed Image Text:In the following proof, what is the justification for line 5? 1. 2. 6. P₁ → (P₂ V P₂) - P3 3. P₁ 4. P₂ P3 V 5. P₂ P₁ → P₂ O OR Elim 4, 2 O -> Elim 1, 3 assumption O -> Elim 6, 3 premise premise assumption → Elim 1,3 ??? → Intro 3-5
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