Question 21
Binary OperationsThe identity element with respect to the element shown in the table above is
- A.p
- B.q
- C.r
- D.s
Show the answer and explanation
Answer: B (q)
Explanation
The identity e satisfies e ⊗ x = x for every x. The row for q reads p, q, r, s, the same as the heading row, so q is the identity.