Question 6
FunctionsThe function f: x → √(4 − 2x) is defined on the set of real numbers R. Find the domain of f.
- A.x < 2
- B.x ≤ 2
- C.x = 2
- D.x > −2
Show the answer and explanation
Answer: B (x ≤ 2)
Explanation
We need 4 − 2x ≥ 0, i.e. x ≤ 2.
The function f: x → √(4 − 2x) is defined on the set of real numbers R. Find the domain of f.
Answer: B (x ≤ 2)
We need 4 − 2x ≥ 0, i.e. x ≤ 2.