# 11 Mathematics by Maktab

### Ex 2.5 LEC 21 Q 1-4

This video lecture from Sets, Functions and Groups (F.Sc. first year Mathematics) covers: Question numbers 1-4 of exercise 2.5. In these questions we convert the given theorems to logical form and prove them by constructing truth tables. 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.