Question

The problem tells me that the local maximum of a function is in x=0, the local minimum is in x=-3 and x?2

Answer 1

a. I need to write the intersections with the x axis of the derivative function...
I think it should be in -3, 2 and 0

Answer 2

is that correct?

Answer 3

b. I need to say in which values of x is the derivative function positive

Answer 4

When it is a minimun, it changes from negative to positive or from positive to negative?