If f : [1, ∞) → [1, ∞) is defined by f(x) = x², then f⁻¹(x) is:
If f : [1, ∞) → [1, ∞) is defined by f(x) = x², then f⁻¹(x) is:
- A. 1/x²
- B. √x
- C. −√x
- D. x²
Answer: B) √x
Explanation: f is bijective on the given domain and codomain. y = x² gives x = √y (since x ≥ 1). Thus f⁻¹(x) = √x.
0 Answers
Log in to post your own answer or join the discussion.
No comments yet — start the discussion.