# MA226 Diff Eqns Spring 2017

### Announcements

• EXTRA OH: Eric MCS B46B Thursday 2:30-4:30 pm, Monday 5-6pm. Come pick up your projects!
• Final Exam info
• School of Communications room 101 on Tuesday May 9 from 9am-11am.
• the material from the projects will not be on the exam. knowing the trace-determinant plane is helpful but not necessary.
• expect a question on bifurcations, mixing, and euler's method. a question may be a full question or a short answer, or a true false, or a multiple choice.
• you will get a photocopy of page 626 to use for your final exam.
• solutions to Devaney's 2011 final and 2015 exam 3 ARE POSTED BELOW.
• so are the notes from Angus' discussions in the last week - this is the review style one.
• Project 2 info
• Come get your projects during OH today! They will also be at the final exam.
• Project 1 info
• You may qualify for a regrade on your project. If you lost points for not specifying you were in a subset OR for using the axes as eigenvectors, you should bring your project to my or Angus' OH

### Homework

• Chapter 6 Laplace Transforms
• 6.1 - 1-3, 7-14, 15-23 odd, 25
• 6.2 - 1, 3, 4-13, 15, 17
• 6.3 - 11-18, 27-34, [OPTIONAL: 19-26]
• 6.4 - 2-5, 6, 7.
For #6, use the section from "Impulse Forcing of a Damped Harm. Osc." on p604 as a model.
• Chapter 5 Nonlinear Systems
• 5.1 - 1, 7-15 odd, 21-25 odd, 26-29
• 5.2 - 1, 4, 5-13 odd, 15, 19
• Chapter 4 Forcing and Resonance
• 4.1 - 3-17 odd, 21-27 odd, 33-37 odd
• 4.2 - 1-9 odd, 11-15, 18-20
• 4.3 - 1-21 odd, 22, 24
• Chapter 3 Linear Systems
• 3.1 - 5-8, 16,17,25,27
• 3.2 - 1-13 odd, 19-24
• 3.3 - 1-11 odd, 13-16, 21
• 3.4 - 1, 2, 3-13 odd, 19, 20
• 3.5 - 1-8, 11, 13, 17-22
• 3.6 - 13-27 odd, 29, 36
• Chapter 2 First Order Systems
• 2.1 - 1,2,8,9-14,18
• 2.2 - 8,11-14,16,18,21,23,25
• 2.3 - 1-7
• 2.4 - 1-13 odd
• 2.5 - 1,2
Use technology!
• 2.6 - 3,4,6,7
• Chapter 1 First Order Differential Equations
• 1.1 - 1-6, 11-14, 17, 18
• 1.2 - 1, 7, 10, 14, 15, 17, 19, 20, 22, 24, 33, 35, 37, 41, 42
• 1.3 - 1a, 3a, 5a, 13, 14, 16
• 1.4 - 1, 2, 5, 6.
Use technology for 1,2. Try 5,6 by hand (but with a calculator).
• 1.5 - 1-8, 13-16
• 1.6 - 1, 2, 4, 5, 7, 13, 14, 16, 17, 19, 30, 31, 32, 34, 35, 36.
For #13-21, some of the detail in the graphs in the back of the book is unrealistic to sketch by hand.
• 1.7 - 1-9, 13, 19, 20
• 1.8 - 1,3,4,5,7,9,11,17,19,20,21,23,29,31
• 1.9 - 1-13 odd, 19,21,23, 24-27

### Significant dates

• May 9: Final Exam. School of Communications room 101 from 9am-11am.

### Discussions

• Tues 2:00 - 2:50 pm PSY B47
• Tues 3:35 - 4:25 pm PRB 150
• Wed 9:05 - 9:55 am CAS 424
• Wed 10:10 - 11:00 am MCS B23
• Wed 4:40 - 5:30 pm MCS B23