If f(x) = 4x, then f(x + 1) – f(x) =
- 4
- f(x)
- 2f(x)
- 3f(x)
- 4f(x)
f(x + 1) – f(x) = 4x + 1 – 4x = 4 · 4x – 4x = 4x(4 – 1) = 3 · 4x = 3 · f(x).
The answer is (d).
If f(x) = 4x, then f(x + 1) – f(x) =
f(x + 1) – f(x) = 4x + 1 – 4x = 4 · 4x – 4x = 4x(4 – 1) = 3 · 4x = 3 · f(x).
The answer is (d).