13 - Which of the following is not a Tautology? I) q-> (p->q) II) (not p) -> (p->q) III) (p and q) -> (p or q) IV) ( (not) p and q) -> (p or (not) q)

Advanced Engineering Mathematics
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ISBN:9780470458365
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Chapter2: Second-order Linear Odes
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13 - Which of the following is not a Tautology?
I) q-> (p->q)
I) (not p) -> (p->q)
III) (p and q) -> (p or q)
IV) ( (not) p and q) -> (p or (not) q)
Transcribed Image Text:13 - Which of the following is not a Tautology? I) q-> (p->q) I) (not p) -> (p->q) III) (p and q) -> (p or q) IV) ( (not) p and q) -> (p or (not) q)
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