← Back to Test

Problem 7 - Entrance Test

Let f: R → R be defined as f(x) = 3x - 5. Then, f⁻¹(x)

Correct: A

Let y = f(x) = 3x - 5. To find the inverse, we need to express x in terms of y. So, y = 3x - 5 => 3x = y + 5 => x = (y + 5) / 3. Therefore, f⁻¹(y) = (y + 5) / 3. Replacing y with x, we get f⁻¹(x) = (x + 5) / 3.