Answer: (−1, 1).
- A (−1, 1)
- B [−1, 1]
- C R
- D (0, 1)
Correct answer: A. (−1, 1)
Explanation: As x varies over R the values approach but never reach ±1, so the range is (−1, 1).
Concept context
Ordered pairs, Cartesian products, types of relations and functions, domain and range. Foundation for calculus and Class 12 algebra.