Question

Second derivative = o gives us what?

Answer 1

critical points to test for .... something

Answer 2

also 2nd derivative = undefined are critical points

Answer 3

i didnt get you can u elaborate

Answer 4

your material elaborates the matter quite nicely. What about it do you not understand?

Answer 5

It could mean a lot of things, depending on what you're looking for.

If the second derivative of some function is 0, then your original function may have been either constant or linear.