Math 1323 Precalculus                       Notes on Section 2.4                          Dr. Cordero




  1. The domains of  and  are the intersection I of the domains of  and ; that is, the numbers that are common to both domains.
  2. The domain of      is the subset of I consisting of all  in I such that .


****See Example 2 on page 185.****


  1. The domain of   is the set of all  in the domain of  such that  is in the domain of  .


****See Example 4 on page 188.****