Answer: 2⁹.
- A 2⁹
- B 3³
- C 2³
- D 9
Correct answer: A. 2⁹
Explanation: A relation is any subset of A × A, which has 9 elements, so there are 2⁹ = 512 relations.
Concept context
Types of relations, equivalence classes, one-one and onto functions, composition, and invertible functions