If f(2) = 4 and f'(2) = 1, then limx→2 x f(2) - 2 f(x)x - 2 is equal to:

Find the value of limh → 0 (2 + h)4 - 16h.

If limx → ∞ (√x2 - x + 1 - ax) = b, then the ordered pair (a, b) is:

Let f : R → R satisfy the equation f(x + y) = f(x) · f(y) for all x, y ∈ R and f(x) ≠ 0 for any x ∈ R. If the function f is differentiable at x = 0 and f'(0) = 3, then limh→0 f(h) - 1h is equal to: