The following link is about the Domain of the function. If you are still struggling with these concepts you may want to check them out. There are three video clips. Watch one or all if you need to:
The first talks about piecewise functions and why domain is important.
The second talks about functions expressed with radicals and fractions and the why domain is an issue for these. Please note that the presenter uses both set and interval notations. We will begin to use these in class shortly.
The third video is on how to find the domain using algebra.
