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Precalculus with Calculus Previews, 6th Edition by Dennis G. Zill, Jacqueline M. Dewar

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9  Systems of Equations and Inequalities

Chapter Contents

9.1    Systems of Linear Equations

9.2    Determinants and Cramer’s Rule

9.3    Systems of Nonlinear Equations

9.4    Systems of Inequalities

9.5    Image Partial Fractions

Chapter 9 Review Exercises

9.1  Systems of Linear Equations

INTRODUCTION Recall from Section 2.3 that a linear equation in two variables x and y is any equation that can be put in the form ax + by = c, where a and b are real numbers and not both zero. In general, a linear equation in n variables x1, x2, …, xn is an equation ...

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