## Calculus 10th Edition

f(x) = 12 f'(x) = $\lim\limits_{ Δx\to 0}$ $\frac{f(x + Δx) - f(x)}{Δx}$ = $\lim\limits_{ Δx\to 0}$ $\frac{12 - 12}{Δx}$ = $\lim\limits_{ Δx\to 0}$ $\frac{0}{Δx}$ = 0