19. Assume (R,+,) is a ring with the property that a²+ a€ cent R for every element a in R. Show that (R,+,) is a commutative ring. [Hint: Make use of the expression (a + 6)2 + (a + b) to prove, first, that a. b+6.a lies in the center.)
19. Assume (R,+,) is a ring with the property that a²+ a€ cent R for every element a in R. Show that (R,+,) is a commutative ring. [Hint: Make use of the expression (a + 6)2 + (a + b) to prove, first, that a. b+6.a lies in the center.)
Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter5: Rings, Integral Domains, And Fields
Section5.2: Integral Domains And Fields
Problem 4E: [Type here]
Examples 5 and 6 of Section 5.1 showed that is a commutative ring with unity. In...
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