Answer: x.
- A x
- B 1/x
- C −x
- D (6x − 4)/(4x + 3)
Correct answer: A. x
Explanation: Substituting shows f is its own inverse, so f(f(x)) = x.
Concept context
Ordered pairs, Cartesian products, types of relations and functions, domain and range. Foundation for calculus and Class 12 algebra.