Jambmaths question:
|
Θ |
K |
L |
M |
|
K |
L |
M |
K |
|
L |
M |
K |
L |
|
M |
K |
L |
M |
The identity element with respect to the multiplication shown in the table above is
Option A:
O
Option B:
M
Option C:
L
Option D:
K
Jamb Maths Solution:
For identity to hold,$\begin{align} & p\otimes e=p\text{ or }e\otimes p=p \\ & \text{so } \\ & M\otimes K=K \\ & M\otimes L=L \\ & M\otimes M=M \\ & \text{So M is the identity element} \\\end{align}$
Jamb Maths Topic:
Year of Exam: