Why is the function of the second derivative in the video a piecewise function as opposed to a stepwise function?

Hello @Steven_Hoang!

I’m not sure if I understood your question correctly, since a stepwise function is a particular case of a piecewise function. Could you elaborate your question?

Thanks,

Lucas

Apologies, I got my terms reversed. I wanted to know why the function of the second derivative was discontinuous at x=2/60.