Question on: JAMB Mathematics - 1992
If the binary operation (\ast) is defined by m (\ast) n = mn + m + n for any real number m and n, find the identity of the elements under this operation
A
e = 1
B
e = -1
C
e = -2
D
e = 0
Ask EduPadi AI for a detailed answer
Correct Option: B
m (\ast) n = mn + m + n
m (\ast) e = me + m + e, e (\ast) m = e
∴ me + m + e, m(e + 1)e - e = 0
e + 1 = 0
∴ e = -1
Add your answer
Please share this, thanks!
No responses