PreCalculusThis title in the Homework Helpers series will reinforce mathematical foundations and bolster students' confidence in precalculus. The concepts are explained in everyday language before the examples are worked. Good habits, such as checking your answers after every problem, are reinforced. There are practice problems throughout the book, and the answers to all of the practice problems are included. The problems are solved clearly and systematically, with stepbystep instructions provided. Particular attention is placed on topics that students traditionally struggle with the most. While this book could be used to supplement a standard precalculus textbook, it could also be used by college students or adult learners to refresh longforgotten concepts and skills. Homework Helpers: PreCalculus is a straightforward and understandable introduction to differential calculus and its applications. It covers all of the topics in a typical Calculus class, including:

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Contents
Preface  9 
Functions  31 
Elementary Functions and Their Graphs  53 
Polynomials  77 
Rational Functions  105 
Power Functions  125 
Exponential and Logarithmic Functions  131 
Systems of Equations and Inequalities  157 
Matrices  183 
Analytic Geometry  199 
Sequences and Series  225 
Common terms and phrases
absolute value symbols additive inverse algebraic arithmetic sequence axis of symmetry calculator called common difference complex number coordinate crosses the xaxis defined degree denominator determine difference quotient directrix ellipse evaluate Example 1 Find Example 1 Solve exponential function exponents Find the equation find the inverse find the zeros foci focus function f(x geometric sequence graph horizontal asymptote hyperbola independent variable integers intersect leading coefficient linear function located logarithmic function major axis multiplicative inverse negative number Notice number line oblique asymptotes odd function off(x origin parabola plane polynomial positive number power functions problem quadratic equation quadratic formula quadratic function quadratic inequality rational function rational number real numbers remainder represent Review second equation setting each factor shown in Figure sign chart simplify Solution solve systems Solve the equation Solve the system subtract system of equations test values vertex vertical asymptote write xcoordinate xintercepts yaxis