Question

Use the graph of the derivative of f to locate the critical points x0 at which f has neither a local maximum nor a local minimum?
answer choices:
1. x0 = a , b
2. x0 = c , a
3. x0 = a , b , c
4. x0 = a
5. none of a , b , c
6. x0 = b
7. x0 = b , c
8. x0 = c

Answer 1

Critical points are where the derivative is 0, i.e. where it crosses the x - axis

The Critical points lies where the derivative is 0, while it crosses the x-axis, SO, in this case the choice 3 looks like best answer for this.