MAT 274, Fall 2010
Dr. Bin Cheng
Office hours M,W,Th 910am at PSA841
Academic Integrity and
Student Obligations

Course description (PDF)
New course description (PDF) in which the prerequisites are changed.
 Announcements
 Test 1 is on Friday, September 24th, in class. It'll cover Chapter 13, especially the sections specified as below for HW 1, 2, 3.
 Test 2 is on Friday, October 22th, in class. It'll cover Chapter 3.4  3.6 (sans variation of parameters), 4.1, 5.1  5.2.
 Homework (regarding esubmission of HW)
 HW1 Readings: Section 1.1, 1.3  1.5
Changes made to Problem 2.
 HW2 Readings: Section 1.5, 2.1  2.3
 HW3 (due date postponed to Monday, Sep 20). Readings: Section 2.2 (esp. page 9798), Section 3.1  3.6
 HW4 (due Oct 4). Readings: Section 3.1  3.5
Changes Problem (2v), the LHS of the DE should be y''(x)9y(x), instead of y''(x)9y'(x).
 Only turn in Problem 1 & 2 on Monday.
 HW5 (due Oct 13). Readings: Section 4.1, 5.1, 5.2 (till Example 2).
Change: Problem 1, mass=1.
 HW6 (due Oct 29).
Change: Problem 1, the lefthand side of the DE should be, x''+x'+3x+.....
 HW7 (due Nov 05).
 HW8 (due Nov 12). Change: in Problem 1,the LSH of the last equation should have a factor of (lower case) "a".
Another change: in Problem 2c), there should a blank for matrix inverse before the (0.5,1) vector.
 HW9 (due Nov 29).
 HW10 (due Dec 7 or in Monday class).
 Other materials
 Sample exams for test 1 (both took 120 minutes). This one (sans Part I #6 and Part II #5); Another one (sans # 1b, 2b, 3, 5, 8, 9).
 Solutions to HW1,
HW2, HW3.
 Practice problems for Section 3.1  3.3 with answers.
 Practice problems for Section 3.5 with answers; more with answers.
 Practice problems for Section 3.4 with answers.
 A cool interactive webpage about damped oscillations  refresh the page when it locks itself.
 A cool interactive webpage about forced oscillations  refresh the page when it locks itself.
 Quiz 3 and answer.
 Practice problems for Chapter 4 and 5 with answers. Sample exams this one and another one  only those problems that are consistent with the Syllabus.
 Solutions to HW6,
HW7, HW8.
 Practice for Test 3. In this one, read 2b, 3a, 3b, 5a, 5b, 8a; this one, read 7, 10; this one, read page 1015.
 Things you should know about the Final Exam.
 Solutions to HW9, HW10.
 Some sample problems for the test  Note that they are in no way comprehensive; see Things you should know about the Final Exam for a complete list.
 In this one, 1a) 2 3a) 4 5 6 7a) 8 are relevant;
 In this one, 1a)b) 4 5 6 7 9 10 are relevant.