MATHEMATICS

JAMB 2009 - Question 19

Mathematics 2009 JAMB Past Questions - Question 19: A binary operation ⊗ defined on the set of integers is such that m⊗n = m + n + mn for all integers m and n. Find the inverse of -5 under this operation, if the identity element is 0?

A binary operation ⊗ defined on the set of integers is such that m⊗n = m + n + mn for all integers m and n. Find the inverse of -5 under this operation, if the identity element is 0?
A:
B:
C:
D:
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Correct Answer

C

Explanation