MATH 2700 homework

Spring 2012

These are homework problems for MATH 2700. Although I will try to keep them up to date, class announcements will give definitive information. The problems are from the text, Differential Equations (4th ed.) by Blanchard, Devaney and Hall.

The date listed is the date the homework was assigned.

1/12/12: Assignment 1 on WebWork, due Wed. 1/18/12. Note: when you log into WebWork, your password is your 810 number with dashes.

Practice and class discussion: Section 1.1, # 5, 12, 17.

1/19/12: Assignment 2 on WebWork, due Wed. 1/25/12.

Practice and class discussion:

Section 1.2 # 1, 2, 7, 13, 21, 23, 29, 35, 39, 41, 43

Section 1.3 # 3, 7, 9, 11, 13

Note: If you purchased the book new, it should have come with a CD containing the software DETools, which is referred to in the homework for Section 1.3. If not, you can find this software at www.math.uga/~esohn/ (follow the link to MATH2700).

1/26/12 Assignment 3 on WebWork, due Wed. 2/1/12.

Practice and class discussion:

Section 1.4 # 3, 7, 12, 15

Section 1.5 # 3, 7, 9, 11, 13

2/2/12 Assignment 4, Problems 1-8, on WebWork, due Wed. 2/8/12. Problems 9-11 are there for you to practice, but won't count towards your grade.

Note on equilibrium points: a sink is stable, a source is unstable, a node is semistable.

Practice and class discussion:

Sec. 1.6 # 1,5,9,13,17,21,23,31,37,39

2/9/12 Assignment 5: This week there is no WebWork assignment. The assigned problems are from the text:

Sec. 1.7 # 2, 3, 7, 11, 13, 15, 17

Test 1 is on Thursday 2/16/12. Material from this homework will be on the test. We'll go over it in class on Tuesday.

2/21/12 Assignment 6: WebWork Assignment 5 is now available. It is due Wednesday 2/29. On Thursday 2/22 we will finish going over the material you need for this assignment.

Remember, you are responsible for the material covered in the problems from the text labelled Practice and class discussion!

Practice and class discussion:

Sec. 1.8 # 5, 11, 13, 17, 21, 29, 30, 31

Sec. 1.9 # 3, 4, 5, 9, 10, 13, 19, 25, 27

3/1/12 Assignment 7: This week there is no WebWork assignment. The assigned problems are from the text. We'll go over them in class on Tuesday and there will be a quiz on Thursday.

Sec. 2.1 # 3, 4, 6, 9, 10, 13, 16, 20, 22, 25

3/8/12 Assignment 8: This week there is no WebWork assignment. We'll go over the problems on Tuesday after Spring Break and there will be a quiz on Thursday.

Sec. 2.2 # 5, 7, 9, 13, 14, 19

Sec. 2.3 # 1, 3, 5, 7, 8

3/22/12 Assignment 9: Test 2 is next Thursday, 3/29/12. Material from this homework will be on the test. We'll go over homework and other questions next Tuesday 3/27.

Sec. 3.1 # 5, 9, 11, 13, 17, 24, 27

Sec. 3.2 # 1, 3, 5, 11, 21

4/5/12 Assignment 10: WebWork Assignment 6 is now available. It is due next Thursday 4/12/12 before class. Note: We did not cover the questions on "What kind of interaction" in Problems 3 and 4, so I will just tell you the answers to that part of the problem: Problem 3 is "Symbiosis", Problem 4 is "Predator-Prey".

Text problems:

Section 3.3 # 1, 2, 9, 13, 19 ab, 21 abc

Section 3.4 # 1, 3, 7, 9, 13, 15

4/19/12 Assignment 11: WebWork Assignment 7 is now available. It is due next Friday 4/27/12.

Note: I will have office hours 4:30-6 on Monday. If you are taking Test 3, feel free to come by to discuss the material. Material from 3.6, 6.1 and 6.3 will be on Test 3 (material from 6.1 and 6.3 is on the Webwork problem set, with the exception of Problem 8).

The remaining text problems cover material from Section 3.6 and from Chapter 6. This material will be covered on the final. The material from 3.6, 6.1 and 6.3 will be on the optional Test 3. Material from 6.2 will be covered in class on Tuesday. If we cover any other material on Tuesday I will add some problems here so please check after class on Tuesday!

Text Problems:

Section 3.6 # 1, 9, 17abcd, 27ab

Section 6.1 # 3, 9, 11, 17, 21

Section 6.3 # 7, 9, 15, 17, 27, 29

The material from the following section will not be on the optional Test 3.

Section 6.2 # 1, 5, 7, 9, 11

Review Session: Tuesday May 1, 4 pm, Room 322

Solutions to Test 3: Test 3 solutions

(I don't have written solutions to the other tests, which we went over in class.)

Final Exam: Thursday, May 3, 8-11 am