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MATHEMATICS

JAMB 2008 - Question 22

Mathematics 2008 JAMB Past Questions - Question 22: A binary operation on the set of real number excluding -1 is such that for all m,nE R,m n=m+n+mn.Find the identity element of the operate .

A binary operation on the set of real number excluding -1 is such that for all m,nE R,m n=m+n+mn.Find the identity element of the operate .

A: 1

B: 0

C: -1/2

D: -1

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Correct Answer

Explanation

mâˆ†n = (m+n + mn) 1 = 1(nm + n + m) identity = 1