43. - (s^q) →a ~pvs p^q ~a
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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Question
Question 43
Transcribed Image Text:For Problems 39-54, test each argument for validity. If it is valid, construct
a formal proof. If it is invalid, produce a counterexample chart.
39. S
(svq) →p
~(p^s)va
a
41.9
(~p~q)^(~rvs)
PAS
43. (s^q) → a
~pvs
p^q
~a
40. PAW
~(rvs)vq
9 -d
-d
42. a →g
~(d^h)→~(ag)
(dvn) →→s
sah
44. (p^s) → b
(r+q) → p
S
r↔ q
b
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