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JEE Main202131 Aug 2021Evening ShiftMathematicsMathematical ReasoningActual

Negation of the statement ( p ∨ r ) ⇒ ( q ∨ r ) is :

Options

  1. A~ p ∧ q ∧ ~ r
  2. B~ p ∧ q ∧ r
  3. Cp ∧ ~ q ∧ ~ r
  4. Dp ∧ q ∧ r

Correct answer

C. p ∧ ~ q ∧ ~ r

Step-by-step solution

The negation of the statement ( p ∨ r ) ⇒ ( q ∨ r ) is given by ~ p ∨ r ⇒ q ∨ r ≡ ~ ~ p ∨ r ∨ q ∨ r ≡ p ∨ r ∧ ~ q ∨ r ≡ p ∨ r ∧ ~ q ∧ ~ r ≡ p ∨ r ∧ ~ r ∧ ~ q ≡ p ∧ ~ r ∨ r ∧ ~ r ∧ ~ q ≡ ( ( p ∧ ~ r ) ∨ ϕ ) ∧ ( ~ q ) ≡ ( p ∧ ~ r ) ∧ ( ~ q ) ≡ p ∧ ~ q ∧ ~ r

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