## 21-260: Differential Equations

# Scheduling Information

**Lecture 1:** 10:30-11:20 in McConomy Auditorium (in the University Center).
**Lecture 2:** 12:30-1:20 in McConomy Auditorium (in the University Center).
**Review Session:**

Time: Monday 12 February, 8:00-9:30pm
Place: DH 2315.
**Office Hours:** I'll post any changes for next week.

**Homework:** You may pick up your graded HW#4 (as well as earlier
homeworks, if you
have not already done so) from your TA during their
office hours.

# Exam #1 Review:

**Read:**

Section 1.1.
Section 1.2.
Section 1.3.
Section 2.1.
Section 2.2.
Section 2.3.
Section 2.4.
Section 2.5.
Section 2.7.
Section 7.1.
Section 7.2, pp. 364-368.
Section 7.3, pp. 374-377.
**Exercises:** Remember, no calculators, laptop computers,
cybernetic implants, etc. will be allowed for the exam. When working
on these problems you should focus on techniques involving only pencil,
paper, and your (biological) brain.

Section 1.1: #1, 3, 7, 9, 27, 31.
Section 1.2: #15.
Section 1.3: #1, 3, 7, 9, 13, 29.
Section 2.1: #1, 3, 9, 17, 19, 29.
Section 2.2: #1, 3, 7, 9, 13, 22.
Section 2.3: #1, 3, 7, 9, 17, 18.
Section 2.4: #1, 4, 11, 12.
Section 2.5: #1, 3, 9, 11, 21, 22, 25.
Section 2.7: #1, 3, 15.
Section 7.1: #23.
Section 7.2: #6, 7, 23.
Section 7.3: #1, 5, 7, 9.
Section 9.5: #1(abef), 3(abef).
**Previous Exam Problems:**

All of these problems (or versions of them) were given as 21-260 exam
problems in a previous semester. Available as
a pdf file.