Precalculus with Calculus Previews, 5th Edition

9 Systems of Equations and Inequalities

Chapter Outline

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 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, …., x_n is an equation of the form ...