Teaching

---

Fall 2025: Math 2700 – Elementary Differential Equations
(CRN 15985)

The letter grades have been uploaded.

Instructor: Ruiwen Shu

Email: ruiwen.shu@uga.edu

Office Hours: TuTh 12:00-1:00

• Location: Boyd Grad Rsch Ctr 541

Lecture time/location:

• Time: TuTh 9:35-10:50
• Location: Boyd Grad Rsch Ctr 304

Textbook:
Differential Equations, 4th Edition, by Blanchard, Devaney and Hall

Syllabus: (updated Aug. 12, 2025)

The Table of Laplace transform will be given during the final exam, see below:

Lecture notes

Format: lecture_DATE_CHAPTER_SECTION

Week 1:

Week 2:

Week 3:

Week 4:

Week 5:

Week 6:

Week 7:

Week 8:

Week 9:

Week 10:

Week 11:

Week 12:

Week 13:

Week 14:

Week 15:

Week 16:

Suggested textbook problems

(for those sections not covered by WebAssign)

Sec. 1.6: 1, 5, 13, 17, 31

Sec. 1.7: 5, 7 (hint: use the condition that f has a multiple root at any bifurcation value)

Sec. 2.2: 9, 19(a)(b)

Sec 2.3: Find general solution for the DEs: y”+4y’+3y=0; y”+6y’+10y=0; y”+2y’+y=0; see answer below:

Sec 2.5: 13(a)(b)(c)

Sec. 4.1: 1, 5, 9

Sec. 4.2: 1, 9, 11

Sec. 4.3: 1, 5, 13

Exam solutions

Midterm1 curve formula: 100(x/100)^0.6