Question: If * is defined on Z such that a * b=a+b-1 for a, b E Z, show that {Z,*} is an abelian group.


If * is defined on Z such that a * b=a+b-1 for

If * is defined on Z such that a * b=a+b-1 for a, b E Z, show that {Z,*} is an abelian group.

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