I N T R O D U C T O R Y C A L C U L U S Second Edition, with Analytic Geometry and Linear Algebra A WAYNE ROBERTS Macalester College ACADEMIC PRESS New York and London C O P Y R I G H T © 1972, BY A C A D E M I C P R E S S , I N C ALL RIGHTS RESERVED NO PART O F THIS BOOK MAY B E REPRODUCED IN ANY F O R M , BY PHOTOSTAT, M I C R O F I L M , RETRIEVAL SYSTEM, OR ANY OTHER MEANS, W I T H O U T W R I T T E N PERMISSION F R O M T H E PUBLISHERS A C A D E M I C PRESS, I N C I l l Fifth Avenue, New Yo[.]