Question

I need to find the second derivative of F(x)=4/(x^2-9)

Answer 1

Find the first derivative first:
f'(x) = -8x / (x^2-9)^2

You can be able to find the second derivative. Just use the quotient rule.

Answer 2

\[ -8 (1/(x^2-9)^2-(2 x (2 x))/(x^2-9)^3)\]

Answer 3

24(x^2+3) / (x^2-9)^3