1. The problem statement, all variables and given/known data Sketch and label on the same pair of axes the graphs of y=f(x) and y=f'(x) for ... c) f(x)=2x 2. Relevant equations 3. The attempt at a solution f(x) = 2x f'(x) = lim as h→0 (2x+h-2x)/h = lim as h→0 (2x2h-2x)/h = lim as h→0 2x(2h-1)/h = lim as h→0 2x ∙ lim as h→0 (2h-1)/h = 2x ∙ lim as h→0 (2h-1)/h I know I have to show that the limit after 2x is equal to ln(2), but how do I do that using this definition? Thanks.