Math 1323 Precalculus                        Notes on Section 2.5               Dr. Cordero

 

 

Problem # 35: Write  and complete the square to get:

         

 

Now solve for  in terms of .

 

 

Problem # 43: Since  is a linear function , it must be either increasing or decreasing.  Therefore by the Theorem on page 197  is one-to-one and has an inverse. Indeed, .

 

 

Problem # 46: (a).

 

                        (b).