4. Let R* be the set of real numbers except 0. Define on R by letting a*b= ab. Decide whether R with binary operation is a group.
4. Let R* be the set of real numbers except 0. Define on R by letting a*b= ab. Decide whether R with binary operation is a group.
Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter1: Fundamentals
Section1.4: Binary Operations
Problem 6E
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