Math 83: Introduction to Differential Equations
Spring 2005 Section 003
TTh 9:30-10:45am
Phillips Hall, Room 0383

Instructor Information:

Instructor: Dr. Long Lee

Textbook: Elementary Differential Equations, Boyce and DiPrima, 7th ed., Wiley

Office: Phillips Hall, Room 366

Phone: (919)843-2218

Email: longlee@email.unc.edu

Office hours: TTh: 11-12, Wed: 3pm, and by appointment

Below you can download some relevant materials for Math 83 (pdf format):

Math 83 course syllabus
Math 83 course topics outline
Math 83 review sheet of algebra, trigonometry and calculus (by Dr. Rudy L. Horne.)

Homework Assignments and Solutions

Below is a running list of homework problems with the due date besides the assignment number
along with the solutions for the graded homework assignments. The listed problems below can
be found at the end of the appropriate section in your textbook.

Homework Asst. #1 (due Thursday, January 27, 2005):
Sec. 1.1: 3, 4, 12, 16
Sec. 1.2: 1(c), 2(a), 6(a), (b) and (c), 13(a), (b)
Sec. 1.3: 1, 4, 5, 6, 8, 12, 14
Sec. 2.1: 3(c), 4(c), 6(c), 14, 15, 28

Solutions to Hwk #1

Homework Asst. #2 (due Thursday, February 03, 2005):
Sec. 2.2: 1, 6, 7, 8, 12(a), (b), 16(a), (b), 20(a), (b), 27, 29, 30(a), (b), (c), (d), (e)

Solutions to Hwk #2

Homework Asst. #3 (due Thursday, February 10, 2005):
Sec. 2.4: 1, 5, 6, 8, 16, 22, 28, 31
Sec. 2.5: 2, 5, 10, 17, 22
Sec. 2.6: 2, 3, 5, 10, 15

Solutions to Hwk #3

Homework Asst. #4 (due Thursday, February 17, 2005):
Sec. 2.8: 2, 5(a), (c), 14
Sec. 3.1: 4, 7, 11, 13, 21

Solutions to Hwk #4

Homework Asst. #5 (due Thursday, March 03, 2005):
Sec. 3.2: 3, 6, 8, 10, 18
Sec. 3.5: 1, 6, 11, 20(a) - (c)

Solutions to Hwk #5

Homework Asst. #6 (due Thursday, March 10, 2005):
Sec. 3.3: 5, 6, 9, 16, 17
Sec. 3.4: 1, 5, 11, 17, 22, 27, 29

Solutions to Hwk #6

Homework Asst. #7 (due Thursday, March 24, 2005):
Sec. 3.6: 2, 3, 7, 9, 17
Sec. 3.7: 4, 7, 9, 12, 15, 22

Solutions to Hwk #7

Homework Asst. #8 (due Tuesday, March 29, 2005):
Sec. 7.1: 1, 3, 4, 5, 15
Sec. 7.2: 2, 3, 4, 6, 8, 10, 16, 17, 22, 23

Solutions to Hwk #8

Homework Asst. #9 (due Tuesday, April 19, 2005):
Sec. 7.3: 4, 6, 15, 16, 21
Sec. 7.5: 3, 8, 15, 18