Derivative of the volume of a cube

[dunit909]

I am asked to find the second derivative of the volume of a cube with respect to the length of a side.

would my initial f(x)=x³/x ??

than just follow with the quotient rule to get f⁽²⁾(x)?

 

[Hootenanny]

I am asked to find the second derivative of the volume of a cube with respect to the length of a side.

would my initial f(x)=x³/x ??

than just follow with the quotient rule to get f⁽²⁾(x)?

Why do you have f(x) = x³/x = x²? Wouldn't that just be the surface area of a single face of the cube rather than it's volume?

 

[HallsofIvy]

What is the FORMULA for the volume of a cube? What is the derivative of that?