This video lecture from Differentiation (F.Sc. second year Mathematics) covers: Introduction (part 3) of chapter 2. This includes conceptual proofs of theorems of differentiation(derivative of constant, derivative of product of function with any constant number, derivative of addition or subtraction of two 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.