Determine whether the following is true or false. Please cite the brief explanation so that I can know why is it true or false. a) The sentence “If x > 0, then compute √π”, is as tatement. b) The compound statement p ∧(q ∨¬p )∧¬q is ac ontradiction. c) ¬( p ∨ q) ≡ ¬p ∧¬q d) 1 ∈ {{1},{2},{3}} e) Set B = {x | x ∈ ℝ and x4 =16} is finite. f) [2,4] U (3,5) is a disjoint union g) A\B = A ∩ Bc h) A X B = B X A I) {{Ø}} = 0 j) The contrapositive of p -> (p V ¬p) = (¬p∧ q) -> ¬p

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
Section: Chapter Questions
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Determine whether the following is true or false. Please cite the brief explanation so that I can know why is it true or false.

a) The sentence “If x > 0, then compute √π”, is as tatement.

b) The compound statement p ∧(q ∨¬p )∧¬q is ac ontradiction.

c) ¬( p ∨ q) ≡ ¬p ∧¬q

d) 1 ∈ {{1},{2},{3}}

e) Set B = {x | x ∈ ℝ and x4 =16} is finite.

f) [2,4] U (3,5) is a disjoint union

g) A\B = A ∩ Bc

h) A X B = B X A

I) {{Ø}} = 0

j) The contrapositive of p -> (p V ¬p) = (¬p∧ q) -> ¬p

 

 

 

 

 

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