Author: John Hornsby,Margaret L. Lial,Jessica Rockswold,Gary K. Rockswold Book Resume: NOTE: This edition features the same content as the traditional text in a convenient, three-hole-punched, loose-leaf version. Books a la Carte also offer a great value; this format costs significantly less than a new textbook. Before purchasing, check with your instructor or review your course syllabus to ensure that you select the correct ISBN.

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When I read the first sentence in the book, which states that "a real number is any number that can be written as a decimal", my heart sank. The language usage is as poor as the accuracy of the statement, and it did not bode well for what the rest of the book may offer. It then proceeds to explain that the set of real numbers contains several important subsets, and calls out the natural numbers, whole numbers and the integers out in 3 clearly separated paragraphs.

But this is followed by a discussion on the use of brackets, before the rational numbers and later, the irrational numbers are described - you have to read the text carefully before it is clear that these are two more subsets of the real numbers. Clearly marked paragraphs for these subsets would have worked better. A good example of this is the formulas given in Chapter 3, pp. These are presented as examples of exponential functions, but in doing so the mathematics is reduced to a subject more akin to the learning of facts rather than learning the art of deduction.

It would have been better to present the section on finance after the section on geometric series, since you need that to explain the formulas. Indeed, the book admits to this "loose end" in Chapter 9, where it belatedly derives one of these formulas, i. The text is well illustrated, with attractive and colourful tables, graphs and pictures. But the content should be better organized with more attention to rigour, thus I would not recommend this book. One typical feature that is extremely disturbing is the fact that the authors decided to throw in mathematical terms without defining them first.

For instance, as early as Chapter 1. There is much more to limits than just "plotting the graph, seeing where the curve goes". The purpose of PreCalc as suggested by its name is to prepare the students to take Calculus. And if we do not want to cover some concepts correctly algebraically and graphically - the motto of this text!

Do it in Calculus! The only reason I ever used this is because someone else chose it for our multiple sections course!

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## ISBN 13: 9780321644732

Beginning with linear functions in Chapter 1, the text uses a four-part process to analyze each type of function, starting first with the graph of the function, then the equation, the associated inequality of that equation, and ending with applications. Included are additional components to build skills, address critical thinking, solve applications, and apply technology to support traditional algebraic solutions, while maintaining its unique table of contents and functions-based approach. About the Author: John Hornsby : When John Hornsby enrolled as an undergraduate at Louisiana State University, he was uncertain whether he wanted to study mathematics, education, or journalism. His ultimate decision was to become a teacher, but after twenty-five years of teaching at the high school and university levels and fifteen years of writing mathematics textbooks, all three of his goals have been realized; his love for teaching and for mathematics is evident in his passion for working with students and fellow teachers as well. His specific professional interests are recreational mathematics, mathematics history, and incorporating graphing calculators into the curriculum.

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## Precalculus With Limits - A Graphing Approach - Cover1

When I read the first sentence in the book, which states that "a real number is any number that can be written as a decimal", my heart sank. The language usage is as poor as the accuracy of the statement, and it did not bode well for what the rest of the book may offer. It then proceeds to explain that the set of real numbers contains several important subsets, and calls out the natural numbers, whole numbers and the integers out in 3 clearly separated paragraphs. But this is followed by a discussion on the use of brackets, before the rational numbers and later, the irrational numbers are described - you have to read the text carefully before it is clear that these are two more subsets of the real numbers. Clearly marked paragraphs for these subsets would have worked better. A good example of this is the formulas given in Chapter 3, pp.