## Spring 2019

MATH 441. Differential Equations, Section X13/X14

## 241 Altgeld Hall, MWF, 12-12:50 pm

**Instructor: Bruce Berndt**

Department of Mathematics

Office: 215 Altgeld Hall

Phone: (217) 333-3970

Fax: (217) 333-9576

Office Hours: 1-2 p.m. MWF; 10-11 a.m. Thurs

Email: berndt@illinois.edu

Textbook: Elementary Differential Equations and Boundary Value Problems,
by Boyce and DiPrima, 10th Edition

Course Syllabus

### Homework Assignments

Section 1.3; odd problems, 1-20

Section 2.1; odd problems, 1-20,38; hand in 17,39,41

Section 2.2; 1,3,5,7,9,12-16,21,25; hand in 23,32

Section 2.6; 1,3,5,7,9,11,15,24,25,29; hand in 23,27

Section 2.4; 29; hand in 31

Section 2.4; 13,14,15,23; hand in 22

Section 2.8; 3,5,7,9,11a,13; hand in 14,15

Section 2.9; odd problems 37-51; hand in 46

Section 3.1; odd problems 1-16,25,28; hand in 23

Section 3.2; odd problems 1-11,13,15,16,17,19,23,31; hand in 25,29

Section 3.3; 1,5,7,9,11,13,15,23,27,31

Section 3.4; odds 1-20,33,41,42,43; hand in 45

Section 3.5; 1,2,3,4,8,9,13,15,17,19; hand in 20

### Selected Solutions

Homework #1

Homework #2

Homework #3

Homework #4

Homework #5

### First Exam

### The first exam covered material up to (but not including) linear second
order differential equations with constant coefficients in which the
characteristic polynomial has complex roots.

### Class Notes on Exact Differential Equations

Exact
Differential Equations

### Example Illustrating Existence and Uniquess of Solutions

Example to Illustrate Existence and Uniquess

Last modified January 14, 2019