This video lecture from Functions and Limits (F.Sc. second year Mathematics) covers: Question 1-3 of exercise 1.2. In these questions we find fog(x), gof(x), fof(x), gog(x) and inverse of a given function. We also determine the domain and range of inversed function without finding inverse of a function. 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.