26. If R is a commutative ring with unity and A is a proper ideal of R, show that RIA is a commutative ring with unity.
26. If R is a commutative ring with unity and A is a proper ideal of R, show that RIA is a commutative ring with unity.
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Can someone please help me understand the following problem. I need to know how to start the problem. i need to know the theorems ,identities, used please thank you.
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