Preface to the Second Edition

This edition has been expanded by material on average rate of change, price/demand, polar form of complex numbers, conic sections in polar coordinates, and the algebra of the dot product. An entire chapter (Chapter 45) is included as an introduction to differential calculus, which now appears in many precalculus texts. More than 30 solved and more than 110 supplementary problems have been added.

Thanks are due to Anya Kozorez and her staff at McGraw-Hill, and to Madhu Bhardwaj and her staff at International Typesetting and Composition. Also, the author would like to thank the users who sent him (mercifully few) corrections, in particular D. Mehaffey and B. DeRoes.

Most of all he owes thanks once again to his wife Gitta, whose careful checking eliminated numerous errors. Any further errors that users spot would be gratefully received at fsafier@ccsf.edu or fsafier@ccsf.cc.ca.us.

Fred Safier