Precalculus : a functional approach with applications / Salvatore Barbasso, John Impagliazzo. Barbasso, Salvatore. Impagliazzo, John, joint author. Functions. QA331.3 .B37 517 BAP Includes index. New York : Harcourt Brace Jovanovich, c1977. c1977. 1977 Text xiv, 413 p. : eng