### Home > CALC > Chapter 3 > Lesson 3.3.2 > Problem 3-107

3-107.

Oliver is trying to find the derivative of *f*(*x*) = −4*x*^{3} at *x* = 2. He substituted and found that *f*(2) = −32. He then took the derivative and got* f *′(2) = 0. What went wrong? Why didn't this work? Homework Help ✎

Consider the order of Oliver's steps.