Math 261, Spring 2019

Math 261 - Elementary Differential Equations
Spring 2019

Syllabus

Unforgivable Math Errors

Announcements:
- The final exam will be given on Wednesday, May 1 from 10:00-11:50 in the normal lecture room. You may prepare a formula sheet to use on the exam. The formula sheet can be one sheet of paper no bigger than 8.5" by 11" with any formulas, problems, or any other material you would like to use on the exam. To study, you may wish to review this list of exam material and this list of practice problems.

Homework Assignments

Homework 1, due Friday, January 11:

Section 1.1, pages 10-11: #2, 4, 5, 12, 16, 17, 23, 28, 32
Section 1.2, pages 17-18: #1, 4, 7, 8, 12, 14

Homework 2, due Friday, January 18:

Section 2.2, pages 51-52: #2, 4, 5, 6, 9, 12, 13, 14, 15, 23, 26, 31, 32
Section 2.3, pages 61-62: #2, 3, 4, 6, 11, 14, 26, 27, 28, 37

Homework 3, due Friday January 25:
Note: Even though these problems aren't due until Friday, it is important that you look over them before Wednesday's exam.

Section 2.4, pages 69-70: #2, 5, 8, 12, 15, 22, 23, 29, 30
Section 2.5, pages 74-75: #1, 4, 6, 9, 10, 14, 17, 18, 22

Homework 4, due Friday, February 1:

Section 3.1, pages 90-91: #1, 2, 4, 6, 9, 13, 14, 16, 23, 24

Homework 5, due Friday, February 8:

Section 4.1, pages 128-129: #4, 14, 16, 19, 25, 27, 31, 32
Section 4.2, page 131: #1, 2, 6, 10, 11
Section 4.3, pages 137-138: #4, 5, 8, 10, 11, 12, 14, 32, 33, 34, 40

Homework 6, due Friday, February 15:

Section 4.3, pages 137-138: #15, 16, 18, 21, 22
Section 4.4, pages 147-148: #3, 4, 8, 12, 19, 22, 24, 28, 31, 38
Section 4.6, pages 161-162: #4, 12, 13, 14, 15, 16

Homework 7, due Friday, February 22:
Note: Even though these problems aren't due until Friday, it is important that you look over them before Wednesday's exam.

Section 4.7, page 168: #1, 6, 10, 14, 20, 23, 24
Section 5.1, pages 205-207: #2, 6, 7, 17, 18, 19, 20, 23, 24, 33, 34

Homework 8, due Friday, March 1:

Section 7.1, page 280: #1, 2, 6, 12, 13, 20, 24, 28, 32

Homework 9, due Friday, March 8:

Section 7.2, pages 288-289: #3, 8, 12, 14, 18, 20, 26, 31, 32, 36
Section 7.3, pages 297-299: #2, 7, 8, 16, 21, 25, 29, 37, 38, 43, 48, 49-54, 58, 65, 66

Homework 10, due Friday, March 22:

Section 7.4, pages 309-310: #1, 2, 8, 10, 12, 21, 27, 32, 39, 43, 49, 50, 51, 52

Homework 11, due Friday, April 5:

Section 6.1, pages 237-238: #1, 2, 10, 11, 12, 14, 23, 24, 26, 27, 28, 30, 31, 36, 38

Homework 12, due Friday, April 12:
Note: When asked to find power series solutions, give at least 4 non-zero terms of the series.

Section 6.2, pages 246-247: #3, 4, 7, 8, 10, 20, 21
Section 6.3, pages 255-256: #1, 3, 8, 13, 14, 17, 21, 25, 26 (for 25 and 26, do NOT use equation (23) to get a second solution)

Homework 13, due Monday, April 22:

Section 12.1, page 459: #1, 2, 5, 6, 8, 10, 11, 13, 14

Homework 14, due Wednesday, May 1:

Section 11.1, page 425: #1, 2, 12
Section 11.2, pages 430-431: #4, 9, 13
Section 11.3, pages 437-438: #11, 14, 17, 25, 32, 33, 40

Old Announcements:
- Quiz 1 will be given on Friday, January 18, and will consist of one of the problems from Homework 2.
- Exam 1 will be given on Wednesday, January 23. It will cover material from Sections 2.2, 2.3, 2.4, and 2.5.
- Exam 2 will be given on Wednesday, February 20. It will cover the material from Sections 3.1, 4.1, 4.2, 4.3, 4.4, 4.6, 4.7, and 5.1.
- Exam 3 will be given on Wednesday, March 27. It will cover material in sections 7.1, 7.2, 7.3, and 7.4. You will receive a table of Laplace transforms to use on the exam.
- Exam 4 will be given on Friday, April 12. It will cover material in sections 6.1, 6.2, and 6.3.