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Appendix B Hints and Answers to Selected Exercises

1 A First Look at Differential Equations
1.1 Modeling with Differential Equations
1.1.9 Exercises

1.4 Analyzing Equations Numerically
1.4.6 Exercises

1.5 First-Order Linear Equations
1.5.8 Exercises

1.6 Existence and Uniqueness of Solutions
1.6.5 Exercises

3 Linear Systems
3.2 Planar Systems
3.2.6 Exercises

4 Second-Order Linear Equations
4.1 Homogeneous Linear Equations
4.1.6 Exercises

4.2 Forcing
4.2.7 Exercises

4.3 Sinusoidal Forcing
4.3.5 Exercises