Question

a*b = a+b-2 on Z ,Find the identity element for the given binary operation and inverse of any element in case it exists (provided identity exists).

Answer 1

In the attachment I have answered this problem.   Concept:  If e is the identity element   then a * e = e * a = a for all a belongs   to Z     See the attachment for detailed solution.  

Answer 2

hope this will help you .

here we have taken inverse of a as a^-1.

mark it as brainliest.