Q. 225.0( 1 Vote )

Mark the correct A. -10

B. 0

C. 10

D. non-existent

Answer :

For Identity element a * e = a = e * a, with ‘e’ being the identity element.


Given a * b = a + b + 10


a * e =a+e+10=a


e=-10 (Not a Natural number)

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