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Abstract Algebra problem - Please show your work clearly! If we are working within a Ring,
prove that a in the Ring.
Solution
R is a ring
The binary operations are addition and multiplication..
( R +) is an abelian group w.r.t addition
0,the additive identity is in R
For all a in R,we have
1. 0+0a=0a=(0+0)a=0a+0a. By the cancellation law it now follows that 0a=0

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