1.

The negation of p ∧ (q → r) is(A) p v (~ q v r) (B) ~ p ∧ (q → r) (C) ~ p ∧ (~ q → ~ r) (D) ~ p v (q ∧ ~ r)

Answer»

(D) 

~ [p ∧ (q → r)]

≡ ~p v ~(q → r) ….(Negation of conjunction) 

≡ ~p v (q ∧ ~r) .…(Negation of implication)



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