Question

If f(x)= 2a|3x – 9| – ax, where a is some constant not equal to zero, find f ′(3).

Answer 1

hmm, it actually doesn't exist because at x=3, that is where the absoluve value turns into 0. the graph has a point at x=3 and there is no slope of a pointy part of a function. I mean the slope is undinfed, it is DNE