Question

Qual é a derivada de 4x?

Answer 1

$\underset{h\to0}\lim\ \frac{4(x+h)-4x}{h}\\\\\underset{h\to0}\lim\ \frac{4x+4h-4x}{h}\\\\\underset{h\to0}\lim\ \frac{4h}{h}\\\\\underset{h\to0}\lim\ 4\\\\\boxed{4}$