This video lecture from Differentiation (F.Sc. second year Mathematics) covers: Question number 1, 2 and 3 of exercise 2.9. In these questions we determine the intervals in which function is increasing or decreasing for the mentioned domain and find the extreme values for the given functions. Find more e-learning material and educational video lectures in Urdu at maktab.pk. These videos are free to use for promotional and commercial purpose by keeping the credits to Maktab.