Instructor: Dr.
Dashun Xu
Office: 273
Neckers Hall A Wing
Office Hours: MW 8:509:55am,
10:50pm11:50am, F:
8:509:55am, Th: 22:55pm, or by appointment
Email: dashunxu@siu.edu Phone: 4536512
Syllabus (Attachment
for more useful webpage and dates)
Textbook: Elementary
Differential Equations & Boundary Value Problems, by Boyce
and DiPrima 10^{th} ed
Grading scale:
Grading
Scale
Grades
Midterm
exams

35

Homework

25

Final

32

Attendance
(deduct 1 point per missed class meeting)

8

Important dates
Semester Classes Begin

Tuesday, January 16

Last
Day to Register

Sunday, January 21

Last Day to drop w/ Reg. Office

Friday, January 26

Last
Day to Drop with Refund

Sunday, January 28

Spring
Break

Sat, March 9Sun, March 17

Last
Day to Drop w/o Refund

Friday, March 29

Total
Solar Eclipse
(Classes
Cancelled)

Monday, April 8

Final
Examinations

Mon, May 6Fri, May 10

Commencement

Saturday, May 11

Homework:
All
assignments will be collected every Friday in class and only a few questions in each
assignment will be graded. Late homework will not be accepted. The
followings are problems assigned last time. I will update these
problems after each class meeting. Please make sure to refresh the webpage
Date

Homework


Week 1


Please use the 10^{th}
edition of the textbook to do the homework problems. Otherwise, will
be marked wrong!

Week 2

Odd numbered 1, 3,
5,
19 in Announcement 2
1.3: 16, 8, 9;;
2.1: find the
general sol. to 1,3,5,7
2.1: (find the
general solutions, i.e. part c ) 9,11, 13, 15,
2.2: 1, 2, 3, 5, 7,

Due on Fri.
Please donot forget to staple your homework
sheets together.
This webpage is updated according to the lecture
pace on MWF. That is, you have to refresh this webpage to updated
homework list.

Week 3

Odd numbered 1, 3,
5,
14 in Announcement 3
2.1: 17, 19;;
2.2: 13(a,c),
22;
2.9: 4, 10, 13
2.6: 3, 11, 13, 15


Week 4

2.6:9, 14
(find the solution);
2.6: (optional: 21; 22,)
2.6: 25, 26, 27, 28, 30;
2.4: 2, 5, 7, 11
2.4: 28, 29, 30, 31

Practice exam 1 (for
you to review Chap 2)
HW due on Fri.

Week 5

2.5: 3, 4, 7, 10

HW due on Fri.
Exam 1 on Fri in Week 6.
Please review Chap1 and 2, and do the practice
exam.

Week 6

3.1: 1, 3, 9, 13, 15, 20
3.2: 9, 13,
Optional: 3, 5, 11, 26

Exam 1 on Fri!!!
HW also due on
Fri.

Week 7

3.3: 7, 11, 17,
19, 21 Optional 9, 12, 15, 20
3.4: 7, 11, 13,

If possible, I still strongly
recommend you to do all problems.
Due on Fri.

Week 8

3.4: 23, 27, 28,
Optional: 12, 25, 29, 30,
3.5: 1, 3, 5, 15,
18

strongly recommend you to do all
problems including optional problems.
Practice for Chap3

Week 9

3.5: 7,
9, 16, 17,
3.5:
21(a, donot solve), 22a,
23(a), 24(a), 25(a)
3.5: Optional:
6, 8, 10, 19

Due on Fri.

Week 10

3.6: 5,
7, 13, 17,
optional: 3, 4, 14, 16, 18
4.1: optional:
14, 15, 16
4.2: 11, 14, 16,


Week 11

4.2: 17, 18, 19, 20, 23, find
solution to IVP: 29, 31; optional: 13, 18, 19, 24, 35
4.3: 2, 3, 6, 9,
4.3: 13, 15, 16,
17, Optional: 1, 10, 12, 14,
16, 18

Practice for Chap4
HW due on Fri.

Week 12

4.4: 2, 3, 9

Homework due on
Fri.
Please do the practice
for chap3 and 4. I will check it in next Mons class.

Week 13

10.1: 1, 3, 4
10.1: 14, 16,
Optional: 2, 5,
HW due also on Fri.

Second
Exam on Fri!!!
Covering
Chap3, 4, and 10.1.

Week 14

10.1: 18
10.2: 13, 15
10.2: 14, 16
10.3: 1, 2, 3,
10.3: 7a,
9a, 11a

Due on Fri


10.4: 7, 8, 9, 15, 16, 24(a,b)
10.5: 1, 2, 5, 6,
Optional: 10.5: 7, 8 after watching the video for 10.5.


Week 15

Practice for the final:
Midterm exams and their practice exams,
homework problems for Chap10.210.5

Final exam: 5/8 Wed: 810am
ENGA 220

Study Hint:
Find at least one or
two other students from the class with whom you can regularly do
homework and prepare for exams. Your classmates are perhaps the least
used and arguably your best resource. An efficient and effective study
group will streamline homework and study time and greatly improve your
written and spoken communication. The best time to use your classmates
as study/homework partners is after you have made an honest effort
on your own to solve the problems using your own wits, knowledge,
and experience. When you encounter an unsolvable problem, don't give up
too soon on it. Being stumped is an opportunity for mathematical growth
and insight, even if you never solve the problem on your own. If you
seek help prematurely, you will never know if you could have solved a
tough problem without outside assistance.
