Show that (pre) v (~p) is a tautology
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Step-by-step explanation:
Tautologies and Contradiction
Tautologies
A proposition P is a tautology if it is true under all circumstances. It means it contains the only T in the final column of its truth table.
Example: Prove that the statement (p⟶q) ↔(∼q⟶∼p) is a tautology.
Solution: Make the truth table of the above statement:
p q p→q ~q ~p ~q⟶∼p (p→q)⟷( ~q⟶~p)
T T T F F T T
T F F T F F T
F T T F T T T
F F T T T T T
As the final column contains all T's, so it is a tautology.
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Instagram id = athlete__aashif
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pakka
Instagram id = athlete__aashif
agr aap follow kroge to...mai bhi karunga......
pakka
Instagram id = athlete__aashif
agr aap follow kroge to...mai bhi karunga......
pakka
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