Question

Whats the derivative of 4pi(r)^3 using the first principles? Show steps.

Im asking because I got 4pi(r)^2 and I know its 12pi(r)^2

Answer 1

first principles means limit definition?

Answer 2

nvm I got it :P

Answer 3

\[\lim_{h\to 0}\frac{4\pi(r+h)^2-4\pi r^2}{h}\]

Answer 4

Yes, in my textbook, its called first principles