Answer: All real numbers except 3.
- A All real numbers
- B All real numbers except 0
- C All real numbers except 3
- D Only positive real numbers
Correct answer: C. All real numbers except 3
Explanation: f(x) is undefined when denominator is 0, i.e., x - 3 = 0, so x = 3 is excluded.
Concept context
Ordered pairs, Cartesian products, types of relations and functions, domain and range. Foundation for calculus and Class 12 algebra.