Second derivative formula

The formula for the second derivative of a function f(x) is:

f''(x) = d^2/dx^2 [f(x)]

This means that the second derivative of a function is found by taking the derivative of the first derivative of the function with respect to x.

$$ f''(x) = \lim_{h \to 0} \frac{f'(x+h) - f'(x)}{h} $$