Fall 2018: Differential Equations

This is the course webpage for MATH 2400 Sections 13-16: Introduction to Differential Equations.

Class information


Meeting time: 12-1:20 Monday and Thursday,  Amos Eaton 214.

Office Hours: Tuesday 1:30-3:30, Thursday 1:30-2:30 in Amos Eaton 412

TA: Bradley Mason

TA Office hours: Monday and Thursday, 10-11 Amos Eaton 428.


Sect 13 Tuesday, 12-12:50

Sect 14 Friday, 12-12:50

Sect 15 Tuesday, 1-1:50

Sect 16 Friday, 1-1:50

All sections are held in Darrin Communication Center (DCC) 232


Grade information may be found on the lms page.

The final grade consists of:

  • Three exams: 25% of course grade each. Exams will be given on October 4, November 5, and December 6.
  • Optional Final Exam (during finals week): 25% of course grade. This score can only be used to help your final grade. If your average drops (or you don’t take the exam), the first three exams will be averaged for your final grade.

If you would like to appeal a grade, please submit your request in writing, either through email or on a sheet of paper. Explain in detail why you believe your exam has not been correctly graded. Arguments over how much partial credit you should obtain will not be entertained. If you write your complaint on paper, you can submit either in class or
during office hours. I’ll usually respond in a day or two with a decision.

Guaranteed grades are as follows:

A: 93-100 A-: 90-92 B+: 87-89 B:   82-86 B-: 80-81 C+: 77-89 C:   72-75 C-:  70-71 D+: 67-69 D:  60-66 F:       < 60

There is a possibility of a grade curve at the end of the semester, but this will not be determined until after the final.

Spring 2018 Notes


Suggested Homework














Exam 1 will be held on Thursday, October 4 in class.  It will cover everything in class up to (BUT NOT INCLUDING) the method of undetermined coefficients.  You will be allowed one sheet for formulas.  You may use both sides of the sheet (but you really shouldn’t need to). For the practice exams, disregard problems dealing with undetermined coefficients.

Practice Exam1

Practice Exam 1 solution

Practice Exam 2 (disregard problem 5- this is an Euler equation, which we have not done yet)

Practice Exam 2 solution


Exam 2 will be held on Monday, November 4 in class.  It will cover everything from undetermined coefficients up to systems of ODE.  However, it will not cover variation of parameters or special instances of systems of ODE (repeated or zero eigenvalues). As before, you will be allowed one sheet for formulas.

Practice Exam 1

Practice Exam 1 solution

Practice Exam 2 (ignore the question on variation of parameters)

Practice Exam 2 solution