Mathematical analysis for business and economics - Altares, Priscila S.; CoPo, antonio Roland I.; Gabuyo, Yonardo A.; Laddaran, Angeline T.; Mejia, Leila P.; Policarpio, Immaculata A.; Sy, Evangelina Agueda G.; Tizon, Helen D.; Yao, Ana Maria S.D (Rex Book Store, 2007)