Precalculus : functions and graphs : a graphing appraoch / 
Larson,Roland E. 
 - Lexington :  D.C. Heath & Co.,  c1994 
 - xxxii,851pages :  ill. ;  24cm. 
<br/><br/><label>Subjects--Topical Terms: </label>--mathematics
<br/><br/><label>Dewey Class. No.: </label>515 LAR