Postulate 2 (a) x+0=x (b) x+1 = x Postulate 5 (a) x + x' = 1 (b) xx' = 0 Theorem 1 (a) x+x=x (b) x+x=x Theorem 2 (a) x+1=1 (b) x+0=0 Theorem 3, involution (x')' = x Postulate 3, commutative (a) x+y=yx (b) xy = yx Theorem 4, associative (a) x + (y + z) = (x + y) + z (b) x(yz) = (xy)z
Postulate 2 (a) x+0=x (b) x+1 = x Postulate 5 (a) x + x' = 1 (b) xx' = 0 Theorem 1 (a) x+x=x (b) x+x=x Theorem 2 (a) x+1=1 (b) x+0=0 Theorem 3, involution (x')' = x Postulate 3, commutative (a) x+y=yx (b) xy = yx Theorem 4, associative (a) x + (y + z) = (x + y) + z (b) x(yz) = (xy)z
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
Problem 1PE
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