3 Let f(ac) = 8 Throughout this exercise, your answers may be in terms of t and x. a. According to the limit definition of the derivative, f'(x) is equal to the following. Your answer may be in terms of t and x. f'(x) = lim b. Next, we simplify. (You must enter both the numerator and denominator to receive any credit for this part. Do not leave an empty blank.) The expression inside the limit simplifies to a simple fraction with the following. Numerator: Denominator:We can cancel the factor appearing in the denominator against a similar factor appearing in the numerator leaving a simpler fraction with the following. Nume rator: Denominator: c. Finally, taking the limit of this fractional expression gives us the following. rise) 2