Let R be a ring, and let ICR be an ideal. Prove that R/I is commutative if and only if xy - yx € I for all x, y E R.

Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter6: More On Rings
Section6.1: Ideals And Quotient Rings
Problem 4E: Exercises If and are two ideals of the ring , prove that is an ideal of .
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1. Let R be a ring, and let ICR be an ideal. Prove that R/I is commutative if and only if xy –
yxE I for all
x, y E R.
Transcribed Image Text:1. Let R be a ring, and let ICR be an ideal. Prove that R/I is commutative if and only if xy – yxE I for all x, y E R.
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