MathematicsBinary operationsJAMB
Find the identity element of the operation a ⊕ b = a + b + ab on the real numbers.
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Answer: A. 0
a + e + ae = a gives e(1 + a) = 0 for all a, so e = 0.
An AdmitMe practice question, written for the JAMB syllabus. Not an official past question.