Question: Consider the set: b 0 d Prove that this set is a subring of M (Z). Does it have unity? :a,b,c EZ and a

Consider the set: b 0 d Prove that this set is a 

Consider the set: b 0 d Prove that this set is a subring of M (Z). Does it have unity? :a,b,c EZ and a is even Revern}

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