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(Z,*) is a group with a*b = a b 1 ∀ a, b ∈Z. T..
1.
(Z,*) is a group with a*b = a b 1 ∀ a, b ∈Z. The inverse of a is
A.
-2
B.
0
C.
-a-2
D.
a-2
Answer» D. a-2
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