By

Hi Dr. Sasho,

I was trying to solve this exercice in the link below but i don't know if i got it right. May you please give me the right answers or the way of doing it?

http://www.umanitoba.ca/student/exams/site/data/136151-121399-F-852928029.pdf

By

Which exercise?

By

exercice number 4 where we have the graph of f'(x) and we are asked to find the critical points and some other points.

Thanks for the quick response,

By

Here is to start you off:

(a) Critical points is where f'(x) is 0 (i.e., where it crosses the x-axis): apparently that happens at x=2 and x=4.

(b) The function increases where f'(x)>0. Again it is visible from the graph that that is true for x between 0 and 2 and for x larger than 4.