Binary Operations - Jamb Mathematics Past Questions and Answers

Question 46:

• JAMB 2014

A binary operation * is defined by x * y = x^y. If x * 2 = 12 - x, find the possible values of x

A. 3,4
B. 3,-4
C. -3,4
D. -3,-4

Question 47:

• JAMB 2020

A binary operation x is defined by a x b = a\(^b\). If a x 2 = 2 - a, find the possible values of a?

A. 1, -2
B. 2, -1
C. 2, -2
D. 1, -1

Question 48:

• JAMB 2021

If the binary \(\ast\) 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