## 21-260: Differential Equations

# Scheduling Information

**Exam Time:**
Lecture 1: 9:30-10:20 (regular class time)
Lecture 2: 10:30-11:20 (regular class time)
**Review Session:**

Time: 6:30-8:00pm, Monday 26 Sep.
Place: HH B103.
**Office Hours:** For Exam #1

Eric Baer: Tuesday 12:00pm-2:00pm (same as usually scheduled).
Josh Taylor: Monday 12:30 - 1:20
Cristina Canepa: Monday 12:30-1:30, Tuesday 1:30-2:30
**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, pp. 1-7.
Section 1.3, pp. 17-20.
Section 2.1.
Section 2.2.
Section 2.3.
Section 2.4, pp. 64-72
Section 2.5.
Section 2.7, pp. 96-103.
**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 1.3: #1, 5, 7, 9, 17, 26.
Section 2.1: #17, 19, 20, 29.
Section 2.2: #1, 3, 13, 15, 16.
Section 2.3: #3, 4, 6, 9, 18.
Section 2.4: #1, 4, 11, 12, 26.
Section 2.5: #1, 12, 13, 20, 22.
Section 2.7: #3, 21.
**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.