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A binary operation plus defined on the set of i... - JAMB Mathematics 2009 Question

A binary operation (plus) defined on the set of integers is such that m (plus) n = n + mn for all integers m and n. Find the inverse of -5 under this operation, if the identity element is 0.

A
\(\frac{-5}{4}\)
B
\(\frac{-5}{6}\)
C
o
D
5
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Correct Option: D
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