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69 Ch. 7 Key Equations – College Algebra 2e | OpenStax

  1. Review Exercises
  2. Practice Test
3

Functions
  1. Introduction to Functions
  2. 3.1 Functions and Function Notation
  3. 3.2 Domain and Range
  4. 3.3 Rates of Change and Behavior of Graphs
  5. 3.4 Composition of Functions
  6. 3.5 Transformation of Functions
  7. 3.6 Absolute Value Functions
  8. 3.7 Inverse Functions
  9. Chapter Review
    1. Key Terms
    2. Key Equations
    3. Key Concepts
  10. Exercises
    1. Review Exercises
    2. Practice Test
4

Linear Functions
  1. Introduction to Linear Functions
  2. 4.1 Linear Functions
  3. 4.2 Modeling with Linear Functions
  4. 4.3 Fitting Linear Models to Data
  5. Chapter Review
    1. Key Terms
    2. Key Concepts
  6. Exercises
    1. Review Exercises
    2. Practice Test
5

Polynomial and Rational Functions
  1. Introduction to Polynomial and Rational Functions
  2. 5.1 Quadratic Functions
  3. 5.2 Power Functions and Polynomial Functions
  4. 5.3 Graphs of Polynomial Functions
  5. 5.4 Dividing Polynomials
  6. 5.5 Zeros of Polynomial Functions
  7. 5.6 Rational Functions
  8. 5.7 Inverses and Radical Functions
  9. 5.8 Modeling Using Variation
  10. Chapter Review
    1. Key Terms
    2. Key Equations
    3. Key Concepts
  11. Exercises
    1. Review Exercises
    2. Practice Test
6

Exponential and Logarithmic Functions
  1. Introduction to Exponential and Logarithmic Functions
  2. 6.1 Exponential Functions
  3. 6.2 Graphs of Exponential Functions
  4. 6.3 Logarithmic Functions
  5. 6.4 Graphs of Logarithmic Functions
  6. 6.5 Logarithmic Properties
  7. 6.6 Exponential and Logarithmic Equations
  8. 6.7 Exponential and Logarithmic Models
  9. 6.8 Fitting Exponential Models to Data
  10. Chapter Review
    1. Key Terms
    2. Key Equations
    3. Key Concepts
  11. Exercises
    1. Review Exercises
    2. Practice Test
7

Systems of Equations and Inequalities
  1. Introduction to Systems of Equations and Inequalities
  2. 7.1 Systems of Linear Equations: Two Variables
  3. 7.2 Systems of Linear Equations: Three Variables
  4. 7.3 Systems of Nonlinear Equations and Inequalities: Two Variables
  5. 7.4 Partial Fractions
  6. 7.5 Matrices and Matrix Operations
  7. 7.6 Solving Systems with Gaussian Elimination
  8. 7.7 Solving Systems with Inverses
  9. 7.8 Solving Systems with Cramer’s Rule
  10. Chapter Review
    1. Key Terms
    2. Key Equations
    3. Key Concepts
  11. Exercises
    1. Review Exercises
    2. Practice Test
8

Analytic Geometry
  1. Introduction to Analytic Geometry
  2. 8.1 The Ellipse
  3. 8.2 The Hyperbola
  4. 8.3 The Parabola
  5. 8.4 Rotation of Axes
  6. 8.5 Conic Sections in Polar Coordinates
  7. Chapter Review
    1. Key Terms
    2. Key Equations
    3. Key Concepts
  8. Exercises
    1. Review Exercises
    2. Practice Test
9

Sequences, Probability, and Counting Theory
  1. Introduction to Sequences, Probability and Counting Theory
  2. 9.1 Sequences and Their Notations
  3. 9.2 Arithmetic Sequences
  4. 9.3 Geometric Sequences
  5. 9.4 Series and Their Notations
  6. 9.5 Counting Principles
  7. 9.6 Binomial Theorem
  8. 9.7 Probability
  9. Chapter Review
    1. Key Terms
    2. Key Equations
    3. Key Concepts
  10. Exercises
    1. Review Exercises
    2. Practice Test
Answer Key
  1. Chapter 1
  2. Chapter 2
  3. Chapter 3
  4. Chapter 4
  5. Chapter 5
  6. Chapter 6
  7. Chapter 7
  8. Chapter 8
  9. Chapter 9

Index

Key Equations

Identity matrix for a 2×2 2×2 matrix I 2 =[ 1 0 0 1

] I 2 =[ 1 0 0 1

]

Identity matrix for a 3×3 3×3 matrix I 3 =[ 1 0 0 0 1 0 0 0 1

] I 3 =[ 1 0 0 0 1 0 0 0 1

]

Multiplicative inverse of a 2×2 2×2 matrix A −1 = 1 ad−bc [ d −b −c a

],where ad−bc≠0 A −1 = 1 ad−bc [ d −b −c a

],where ad−bc≠0

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