Math 1323 Precalculus Notes on Section 2.4 Dr. Cordero

- The following will help with Problems # 5 and # 7 in the homework.

- The
__domains__of and are the__intersection__I of the domains of and ; that is, the numbers that are__common__to both domains. - The
__domain__of is the subset of I consisting of all in I such that .

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

- 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.****

- For Problem # 45 in the homework, read Example 6 on page 189. Use the formula for the area of a circle .