MATHEMATICS
JAMB 2009 - Question 21
Mathematics 2009 JAMB Past Questions - Question 21: A binary operation * defined on the set of integer is such that m*n=m+n+mn for all integer m and n .Find the inverse of -5 under this operation,if the identity element is 0.
A:
B:
C:
D:
Correct Answer
D
Explanation
inverse of - 5 = - (-5) = + 5 = 5
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