# Math 285 Introduction to Differential Equation

# Homepage for Section E1, Sring 2016

Lectures:
MWF from 1:00 to 1:50pm

Location:
245 Altgeld Hall.

Instructor:
Ming Xiao

Email:
mingxiao@illinois.edu

Office Hours:
Thursday 2:30-4 pm, Friday 10:00-11:30 am, 257 Altgeld Hall (or by appointment).

Textbook:
*Differential Equations and Boundary Value Problems*, C. Edwards, D. Penney, **2rd Custom edition for University of Illinois**. ISBN:978-1-323-01557-5.

Online Score:
You will be able to check your scores for the graded homework and the tests on the Moodle(learn.illinois.edu).

Please check them for accurary and report to me immediately any discrepancy with the scores you have on your homework or test.

Exam:
There will be 3 quizzes this semester, about 15 points each. The first two will be given on Feb. 5th and
March. 16th;
There will be two midterm exams, 100 points each. They will be given on Feb. 26th and April 22rd.
Final exam(200 points) will be on Friday, May 6th, 8-11 am.

Grading Policy:
The grades will be determined as follows:

Quizzes-10% of your grades;
Homework-10% of your grades;
Midterms-Each midterm counts 20% of your grades;
Final-40% of your grades.

**Click here to obtain the syllabus.**

## Notes: You can find handout here

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** March 28th: Key of Quiz 2; Handout for Section 9.2.
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** April 4th: Handout for Section 9.3.
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** April 6th: Handout Part II for Section 9.3.
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** April 11th: Key of Quiz 3.
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** April 13th: Handout for Section 9.4.
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**April 25th: Key of Midterm 2.
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**April 27th: Handout for Section 9.5.
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**Addtional material: Practice problems for Midterm 1. Key to the problems.
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**Addtional material: Practice problems for Midterm 2. Key to the problems.
**

## Announcements:

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Schedule of Exam :

The final exam will be on Friday, May 6th, 8-11am at 245 Altgeld Hall. It will cover all materials taught this semester up to Section 9.5. Click here to obtain practice problems. Here
is the Key to the practice problems.
You are suggested to work on it first by yourself. We will discuss it next week in class. Here are some extra office hours besides the regular ones:

May 3, 3 -4:30 pm

May 4, 3-4:30 pm

May 5, 4-5:00 pm.

Addtional policy of HW :
The lowest two HW grades will be dropped. The maximal HW total grade you can get is 90/90.

There will be regular tutoring sessions for Math 285/286 Spring 2016. It will held by TA's. The following is the regular schedule for this semester. All of you are encouraged to take advantage of this resource.

Monday, Tuesday, Wednesday, Thursday: 345 Altgeld Hall
3-7 pm,

Friday: 239 Altgeld Hall
12-4pm

## Homework Assignment

**
HW1:
Due Monday, Jan. 25th in class.
**

Section 1.1: 9, 16, 42.

Section 1.2: 5, 7, 10, 14.

HW2:
Due Monday, Feb. 1st in class.

Section 1.3: None.

Section 1.4: 2, 12, 25, 27,

Section 1.5: 2, 10, 26.

HW3:
Due Monday, Feb. 8th in class

Section 1.6: 1, 20, 36:

HW 4: Due Monday, Feb. 15th in class.

Section 3.1: 11, 20, 40, 41.

HW5: Due Monday, Feb. 22rd in class.

Section 3.3: 2, 7, 10, 19, 20, 24, 36.

HW6: Due Monday, March 7th in class.

Section 3.5: 2, 4, 6, 21, 22, 33.

HW7: Due Monday, March 14th in class.

Section 3.8: 2, 4, 5, 7 (a), (b).

HW8: Due Monday, March 28th in class.

Section 9.1: 2, 9, 11, 13.

Section 9.2: 1, 4, 10.

HW9: Due Monday, April 4th in class.

Section 9.2: 15.

Section 9.3: 1, 2, 9.

HW10: Due Monday, April 11th in class.

Section 9.3: 11, 12, 14, 16(b).

HW11: Due Monday, April 18th in class.

Section 9.4: 2, 4, 11.

HW12: This is NOT a required HW. You don't have to hand in. But you are suggested to work on it as a good practice. If you hand it in on Monday, May 2rd in class, you may get up to 5 bonus points that will be added to your HW grade.

Section 9.5: 1, 9.