Answer: [-2, 2].
- A [-2, 2]
- B (-2, 2)
- C [0, 2]
- D All reals
Correct answer: A. [-2, 2]
Explanation: We need 4 - x² is greater than or equal to 0, i.e., x² is less than or equal to 4, so -2 is less than or equal to x is less than or equal to 2.
Concept context
Ordered pairs, Cartesian products, types of relations and functions, domain and range. Foundation for calculus and Class 12 algebra.