Answer: 5.
- A 6
- B 4
- C 5
- D 9
Correct answer: C. 5
Explanation: g(2) = 4, then f(4) = 5 - different from (g∘f)(2), showing composition is not commutative.
Concept context
Types of relations, equivalence classes, one-one and onto functions, composition, and invertible functions