Gelfand S. Learn limits through problems Workbook 2 1969

Textbook in PDF format

This is the second work book in the Pocket Mathematical Library. It is essentially a programmed text inviting you to learn about limits (a key concept of modern mathematics) by solving a series of 56 problems and reading a little interspersed text. The problems are for the most part equipped with hints and answers (or both), enough for you to get the hang of them (harder problems are marked with asterisks). Moreover, the problems fall into three groups. The first, called "Preliminaries", puts you into the right frame of mind for absorbing the limit concept. The second, called "Concepts", presents the irreducible amount of theoretical material needed to understand limits. The third, called "Calculations", shows you how to evaluate limits once you know what they are