1): Select the law which shows that the two propositions are logically equivalent. ¬((w∨p)∧(¬q∧¬w)) ¬(w∨p)∨¬(¬q∧¬w) A): DeMorgan’s law B): Distributive law C): Associative law D): Complement law     2):  Select the proposition that is a tautology.

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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1): Select the law which shows that the two propositions are logically equivalent.

¬((w∨p)∧(¬q∧¬w))

¬(w∨p)∨¬(¬q∧¬w)

A): DeMorgan’s law
B): Distributive law
C): Associative law
D): Complement law
 
 
2):  Select the proposition that is a tautology.
  1.  (p∧q)→¬p
  2.  (p∨q)→p
  3.  (p∧q)↔p

    4 . (p∧q)→p

 

A): 4

B): 1
C): 2
D): 3
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