precalculus : a graphing approach / 
Larson, Roland E. 
 - Lexington :  D.C. heath & Co.,  c1993 
 - xxx,794p. :  ill. ;  25cm. 
<br/><br/><label>Subjects--Topical Terms: </label>--mathematics
<br/><br/><label>Dewey Class. No.: </label>515.1 LAR