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- Chapter 1: Introduction to Differential Equations
- 1.1: Definitions and Terminology
- 1.2: Initial-Value Problems
- 1.3: Differential Equations as Mathematical Models
- 1: Review Questions (21)
- 1: Test Bank (18)
- Chapter 2: First-Order Differential Equations
- 2.1: Solutions Curves Without a Solution
- 2.2: Separable Equations
- 2.3: Linear Equations
- 2.4: Exact Equations
- 2.5: Solutions by Substitutions
- 2.6: A Numerical Method
- 2.7: Linear Models
- 2.8: Nonlinear Models
- 2.9: Modeling with Systems of First-Order Des
- 2: Review Questions (30)
- 2: Test Bank (12)
- Chapter 3: Higher-Order Differential Equations
- 3.1: Theory of Linear Equations
- 3.2: Reduction of Order
- 3.3: Homogeneous Linear Equations with Constant Coefficients
- 3.4: Undetermined Coefficients
- 3.5: Variation of Parameters
- 3.6: Cauchy-Euler Equation
- 3.7: Nonlinear Equations
- 3.8: Linear Models: Initial-Value Problems
- 3.9: Linear Models: Boundary-Value Problems
- 3.10: Green's Functions
- 3.11: Nonlinear Models
- 3.12: Solving Systems of Linear Equations
- 3: Review Questions (38)
- 3: Test Bank (7)
- Chapter 4: The Laplace Transform
- 4.1: Definition of the Laplace Transform
- 4.2: The Inverse Transform and Transforms of Derivatives
- 4.3: Translation Theorems
- 4.4: Additional Operational Properties
- 4.5: The Dirac Delta Function
- 4.6: Systems of Linear Differential Equations
- 4: Review Questions (35)
- 4: Test Bank (12)
- Chapter 5: Series Solutions of Linear Differential Equations
- 5.1: Solutions about Ordinary Points
- 5.2: Solutions about Singular Points
- 5.3: Special Functions
- 5: Review Questions (13)
- 5: Test Bank (4)
- Chapter 6: Numerical Solutions of Ordinary Differential Equations
- 6.1: Euler Methods and Error Analysis
- 6.2: Runge-Kutta Methods
- 6.3: Multistep Methods
- 6.4: Higher-Order Equations and Systems
- 6.5: Second-Order Boundary-Value Problems
- 6: Review Questions (8)
- 6: Test Bank
- Chapter 7: Vectors
- 7.1: Vectors in 2-Space
- 7.2: Vectors in 3-Space
- 7.3: Dot Product
- 7.4: Cross Product
- 7.5: Lines and Planes in 3-Space
- 7.6: Vector Spaces
- 7.7: Gram-Schmidt Orthogonalization Process
- 7: Review Questions (38)
- 7: Test Bank (6)
- Chapter 8: Matrices
- 8.1: Matrix Algebra
- 8.2: Systems of Linear Algebraic Equations
- 8.3: Rank of a Matrix
- 8.4: Determinants
- 8.5: Properties of Determinants
- 8.6: Inverse of a Matrix
- 8.7: Cramer's Rule
- 8.8: The Eigenvalue Problem
- 8.9: Powers of Matrices
- 8.10: Orthogonal Matrices
- 8.11: Approximation of Eigenvalues
- 8.12: Diagonalization
- 8.13: Cryptography
- 8.14: An Error-Correcting Code
- 8.15: Method of Least Squares
- 8.16: Discrete Compartmental Models
- 8: Review Questions (36)
- 8: Test Bank (9)
- Chapter 9: Vector Calculus
- 9.1: Vector Functions
- 9.2: Motion on a Curve
- 9.3: Curvature and Components of Acceleration
- 9.4: Partial Derivatives
- 9.5: Directional Derivative
- 9.6: Tangent Planes and Normal Lines
- 9.7: Curl and Divergence
- 9.8: Line Integrals
- 9.9: Independence of the Path
- 9.10: Double Integrals
- 9.11: Double Integrals in Polar Coordinates
- 9.12: Green's Theorem
- 9.13: Surface Integrals
- 9.14: Stokes' Theorem
- 9.15: Triple Integrals
- 9.16: Divergence Theorem
- 9.17: Change of Variables in Multiple Integrals
- 9: Review Questions (47)
- 9: Test Bank (8)
- Chapter 10: Systems of Linear Differential Equations
- 10.1: Theory of Linear Systems
- 10.2: Homogeneous Linear Systems
- 10.3: Solution by Diagonalization
- 10.4: Nonhomogeneous Linear Systems
- 10.5: Matrix Exponential
- 10: Review Questions (15)
- 10: Test Bank (2)
- Chapter 11: Systems of Nonlinear Differential Equations
- 11.1: Autonomous Systems
- 11.2: Stability of Linear Systems
- 11.3: Linearization and Local Stability
- 11.4: Autonomous Systems as Mathematical Models
- 11.5: Periodic Solutions, Limit Cycles, and Global Stability
- 11: Review Questions (13)
- 11: Test Bank (9)
- Chapter 12: Orgthogonal Functions and Fourier Series
- 12.1: Orgthogonal Functions
- 12.2: Fourier Series
- 12.3: Fourier Cosine and Sine Series
- 12.4: Complex Fourier Series
- 12.5: Sturn-Liouville Problem
- 12.6: Bessel and Legendre Series
- 12: Review Questions (15)
- 12: Test Bank (8)
- Chapter 13: Boundary-Value Problems in Rectangular Coordinates
- 13.1: Separable Partial Differential Equations
- 13.2: Classical PDEs and Boundary-Value Problems
- 13.3: Heat Equation
- 13.4: Wave Equation
- 13.5: Laplace's Equation
- 13.6: Nonhomogeneous BVPs
- 13.7: Orthogonal Series Expansions
- 13.8: Fourier Series in Two Variables
- 13: Review Questions (9)
- 13: Test Bank (8)
- Chapter 14: Boundary-Value Problems in Other Coordinate Systems
- 14.1: Problems in Polar Coordinates
- 14.2: Problems in Cylindrical Coordinates
- 14.3: Problems in Spherical Coordinates
- 14: Review Question (6)
- 14: Test Bank
- Chapter 15: Integral Transform Method
- 15.1: Error Function
- 15.2: Applications of the Laplace Transform
- 15.3: Fourier Integral
- 15.4: Fourier Transforms
- 15.5: Fast Fourier Transform
- 15: Review Questions (9)
- 15: Test Bank (3)
- Chapter 16: Numerical Solutions of Partial Differential Equations
- 16.1: Laplace's Equation
- 16.2: The Heat Equation
- 16.3: The Wave Equation
- 16: Review Question (3)
- 16: Test Bank (4)
- Chapter 17: Functions of a Complex Variable
- 17.1: Complex Numbers
- 17.2: Powers and Roots
- 17.3: Sets in the Complex Plane
- 17.4: Functions of a Complex Variable
- 17.5: Cauchy-Riemann Equations
- 17.6: Exponential and Logarithmic Functions
- 17.7: Trigonometric and Hyperbolic Functions
- 17.8: Inverse Trigonometric and Hyperbolic Functions
- 17: Review Questions (36)
- 17: Test Bank (7)
- Chapter 18: Integration in the Complex Plane
- 18.1: Contour Integrals
- 18.2: Cauchy-Goursat Theorem
- 18.3: Independence of Path
- 18.4: Cauchy's Integral Formulas
- 18: Review Questions (29)
- 18: Test Bank
- Chapter 19: Series and Residues
- 19.1: Sequences and Series
- 19.2: Taylor Series
- 19.3: Laurent Series
- 19.4: Zeros and Poles
- 19.5: Residues and Residue Theorem
- 19.6: Evaluation of Real Integrals
- 19: Review Questions (33)
- 19: Test Bank (6)
- Chapter 20: Conformal Mappings
- 20.1: Complex Functions as Mappings
- 20.2: Conformal Mappings
- 20.3: Linear Fractional Transformations
- 20.4: Schwarz-Christoffel Transformations
- 20.5: Poisson Integral Formulas
- 20.6: Applications
- 20: Review Questions (16)
- 20: Test Bank
- Chapter 21: Statistics and Probability
- 21: Statistics and Probability (34)
Questions Available within WebAssign
Most questions from this textbook are available in WebAssign. The online questions are identical to the textbook questions except for minor wording changes necessary for Web use. Whenever possible, variables, numbers, or words have been randomized so that each student receives a unique version of the question. This list is updated nightly.
Question Availability Color Key
| BLACK questions are available now |
| BOLD ORANGE questions are under development |
| Group | Quantity | Questions |
|---|---|---|
| Chapter 1: Introduction to Differential Equations | ||
| R | 21 | 001 002 003 004 005 006 007 008 009 010 011 012 015 016 017 019 020 022 027 028 029 |
| TB | 18 | 001 002 003 004 005 006 007 008 009 010 011 012 013 014 015 016 017 018 |
| Chapter 2: First-Order Differential Equations | ||
| R | 30 | 001 002 003 004 005 006 008 009 011 012 013 014 015 016 017 018 019 022 024 025 026 027 028 031 033 036 037 038 039 040 |
| TB | 12 | 001 002 003 004 005 006 007 008 009 010 011 012 |
| Chapter 3: Higher-Order Differential Equations | ||
| R | 38 | 001 002 003 004 005 006 007 008 009 010 013 014 015 016 017 020 021 022 024 025 026 027 028 029 033 035 036 037 038 041 042 043 045 047 048 049 055 056 |
| TB | 7 | 001 002 003 004 005 006 007 |
| Chapter 4: The Laplace Transform | ||
| R | 35 | 001 002 003 004 005 006 007 008 009 010 011 012 013 014 015 016 017 020 021 022 025 026 027 028 029 030 031 032 033 034 037 038 039 040 041 |
| TB | 12 | 001 002 003 004 005 006 007 008 009 010 011 012 |
| Chapter 5: Series Solutions of Linear Differential Equations | ||
| R | 13 | 001 002 003 005 006 009 010 013 015 016 017 019 020 |
| TB | 4 | 027 028 029 030 |
| Chapter 6: Numerical Solutions of Ordinary Differential Equations | ||
| R | 8 | 001 002 003 004 005 006 007 008 |
| Chapter 7: Vectors | ||
| R | 38 | 001 002 004 005 006 008 009 010 012 013 014 016 017 018 020 021 022 024 025 026 028 029 030 031 032 034 036 037 039 040 042 044 045 046 047 048 049 050 |
| TB | 6 | 025 026 027 028 029 030 |
| Chapter 8: Matrices | ||
| R | 36 | 002 003 004 005 006 007 008 009 010 011 012 013 014 015 016 017 018 019 020 026 027 029 030 031 032 035 036 037 039 040 042 044 046 047 048 049 |
| TB | 9 | 001 002 003 004 005 006 007 008 009 |
| Chapter 9: Vector Calculus | ||
| R | 47 | 001 002 004 005 006 008 009 010 012 013 014 016 017 018 020 021 022 024 026 027 028 030 031 032 036 038 039 040 041 042 043 044 047 049 051 052 053 055 056 057 058 059 060 061 063 064 065 |
| TB | 8 | 023 024 025 026 027 028 029 030 |
| Chapter 10: Systems of Linear Differential Equations | ||
| R | 15 | 001 002 003 004 005 006 007 008 009 010 011 012 013 014 015 |
| TB | 2 | 005 006 |
| Chapter 11: Systems of Nonlinear Differential Equations | ||
| R | 13 | 001 002 003 004 005 006 007 008 009 010 013 014 016 |
| TB | 9 | 022 023 024 025 026 027 028 029 030 |
| Chapter 12: Orgthogonal Functions and Fourier Series | ||
| R | 15 | 001 002 003 004 005 006 007 008 009 010 013 014 015 016 020 |
| TB | 8 | 001 002 003 004 005 006 007 008 |
| Chapter 13: Boundary-Value Problems in Rectangular Coordinates | ||
| R | 9 | 001 003 005 007 008 009 012 013 014 |
| TB | 8 | 001 002 003 004 005 006 007 008 |
| Chapter 14: Boundary-Value Problems in Other Coordinate Systems | ||
| R | 6 | 001 002 003 004 007 009 |
| Chapter 15: Integral Transform Method | ||
| R | 9 | 001 002 004 006 007 008 013 016 017 |
| TB | 3 | 028 029 030 |
| Chapter 16: Numerical Solutions of Partial Differential Equations | ||
| R | 3 | 001 002 003 |
| TB | 4 | 027 028 029 030 |
| Chapter 17: Functions of a Complex Variable | ||
| R | 36 | 001 002 003 004 005 006 007 008 009 010 011 012 013 014 015 016 017 018 019 020 021 022 023 024 025 027 028 029 030 031 032 033 034 035 036 038 |
| TB | 7 | 024 025 026 027 028 029 030 |
| Chapter 18: Integration in the Complex Plane | ||
| R | 29 | 001 002 003 004 005 006 007 008 009 010 011 012 013 014 015 016 017 018 019 020 021 022 023 024 025 026 027 028 029 |
| Chapter 19: Series and Residues | ||
| R | 33 | 001 002 003 004 005 006 007 008 009 010 011 012 013 015 016 017 018 019 020 021 022 023 024 025 026 027 028 029 030 031 032 033 034 |
| TB | 6 | 001 002 003 004 005 006 |
| Chapter 20: Conformal Mappings | ||
| R | 16 | 001 002 003 004 005 006 007 008 009 010 011 012 013 014 015 018 |
| Chapter 21: Statistics and Probability | ||
| 21.8 | 10 | 007 009 010 012 018 019 023 025 028 031 |
| 21.23 | 7 | 001 003 005 010 013 019 020 |
| 21.49 | 7 | 001 003 005 008 011 017 029 |
| 21.57 | 6 | 001 003 007 008 012 017 |
| 21.60 | 4 | 002 003 006 012 |
| Total | 607 | |

