Discrete Mathematics - Mathematical Logic

1. Which of the following propositions is tautology?

  • Option : C
  • Explanation : A tautology is a statement that is always true.

    qpq→pp→qp v (p→q)p v (q→p)
    TTTTTT
    TFFTTF
    FTTFTT
    FFTTTT
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2. Which of the proposition is p^ (~ p v q) is

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3. Which of the following is/are tautology?

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4. Logical expression ( A^ B) → ( C' ^ A) → ( A ≡ 1) is

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5. Identify the valid conclusion from the premises Pv Q, Q → R, P → M, ˥M

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