### Derivatives, Epsilon-Delta Proof of Continuity and Integrals

A) If x, y > 0, then ln x - ln y = ln x ¯¯¯¯ ln y b) If f'(a) = 0 and f"(a) = 0, then the function f does not have an extreme point at x = a. c) For every real number x, we have ln(e^x²-¹) = (x - 1)(x + 1) (e