Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Which of the following are correct?
(a) A≡B|=(A∨B).
(b) (A≡B)|=¬A∨B.
(c) (A∧B)→C|=(A→C)∨(B→C).
(d) (A∨B)∧(¬C∨¬D∨E)|=(A∨B)∧(¬D∨E).
(e) (A ≡ B) ∧ (¬A ∨ B) is satisfiable.
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- Select the following statements that are true. (pVq) ^ (pV¬q) = (p^¬q) V (p^q) ¬(pq) = (p^¬q) P→→q is the converse of q→→ p ¬(p ^ q) = (-p) ^ (q) ¬p → (q V ¬p) is a tautologyarrow_forwardConjuctive Normal Form of these formula with step by step solution 1. q ↔ (p ∧ q) 2. ¬q → ¬(p ∧ (p → q))arrow_forward
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