I referred BIT reference book but I have Doubts. Then I searched then Net Then Found some YouTube Videos And they are easy to Understand. But I prefer if you guys can give me video links It would be great since you know the Concept very well.

Here is the Topics we have for BIT in Functions.

**Function**

Function as a mapping from a set A to a set B

Range of function; Function from a finite set A onto a set B

One to one functions

Bijections

Inverse functions

Composite functions