(z,*) is a group with a*b = a+b+1 ∀ a, b ∈z. the inverse of a is

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(z,*) is a group with a*b = a+b+1 ∀ a, b ∈z. the inverse of a is

Options:

A . 0

B . -2

C . a-2

D . -a-2

Answer: Option D
Explanation :

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