Choice: If f ′(x) = 6x² − 4, then which of the following could be f(x)? Homework Help ✎

1. f(x) = 2x³ − 4x + l

2. f(x) = 2x³ − 4x − 4

3. f(x) = 2x³ − 4x + 4

4. f(x) = 2x(x² − 2)

5. All of these