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प्रश्न
Write the negation of the following statement.
∃ x ∈ A, such that x + 5 < 11.
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उत्तर
∀ x ∈ A, x + 5 ≥ 11
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Using truth table prove that:
~ (p `leftrightarrow` q) ≡ (p ∧ ~ q) ∨ (q ∧ ~ p)
