3 ms·

Same in Haskell: Main> derivative f x = (f(x+dx)-f(x))/dx where dx = 0.0001 Main> derivative (^3) 2 12.000600010022566

Same in Haskell: *Main> derivative f x = (f(x+dx)-f(x))/dx where dx = 0.0001 *Main> derivative (^3) 2 12.000600010022566