The set of integers Z with the binary operation \"*\" defined as a*b =a b 1 for a, b ∈ Z, is a group. The identity element of this group is

The set of integers Z with the binary operation \"*\" defined as a*b =

1.	The set of integers Z with the binary operation \"\" defined as ab =a b 1 for a, b ∈ Z, is a group. The identity element of this group is
A.	1
B.	0
C.	12
D.	-1
Answer» E.

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The set of integers Z with the binary operation \"*\" defined as a*b =a b 1 for a, b ∈ Z, is a group. The identity element of this group is

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The set of integers Z with the binary operation \"\" defined as ab =a b 1 for a, b ∈ Z, is a group. The identity element of this group is