Answer: 8.
- A 8
- B 9
- C 10
- D 7
Correct answer: A. 8
Explanation: f(2) = 4 - 1 = 3. Then f(f(2)) = f(3) = 9 - 1 = 8.
Concept context
Ordered pairs, Cartesian products, types of relations and functions, domain and range. Foundation for calculus and Class 12 algebra.