This video lecture from Sets, Functions and Groups (F.Sc. First year Mathematics) covers: Question numbers 4 of exercise 2.6. In this question we find the inverse of each of the given relations and also tell whether each relation and its inverse is a function or not. 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.