Let A = {1, 2, 3, 5, 6, 10, 15, 30} and define R on A by xRy if and only if x divides y. a. Find any greatest or least element/s. b. Find glb({6, 10, 15}) if it exists.  c. Find lub({2, 3, 6}) if it exists.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter4: Polynomial And Rational Functions
Section4.3: Zeros Of Polynomials
Problem 55E
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Let A = {1, 2, 3, 5, 6, 10, 15, 30} and define R on A by xRy if and only if x divides y.

a. Find any greatest or least element/s.

b. Find glb({6, 10, 15}) if it exists. 

c. Find lub({2, 3, 6}) if it exists. 

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