# Math 246 Quizzes and Homeworks, Fall 2011

There will be up to eleven short in-class quizzes based on homeworks. Homeworks will not be collected.
The list of quiz problems is cumulative. That means you might get a problem listed in a previous set of homework problems.

• Quizzes on material covered on the first in-class exam (27 September)

• Quizzes on material covered on the second in-class exam (1 November)

• Quizzes on material covered on the third in-class exam (6 December) and final exam (15 December)

No calculators, books, or notes may be used during quizzes. All items except pens, pencils, and erasers must be off the desktops.
Quizzes will be given at the beginning of the class period. They will be short. Please be sure to arrive on time!

These in-class quizzes will be worth 10 points each. However only the largest eight quiz scores will count towards the course grade. No make-up quizzes will be given.

If the University closes on the day of a scheduled quiz and no exam is scheduled that week then the quiz will be given the next time the class meets. If the University closes on the day of a scheduled quiz and an exam is scheduled that week then the quiz will be cancelled.

HOMEWORKS

Below are the weekly homework assignments. These will not be collected. However the material from the homework will appear on the quizzes and exams. The dates given are when the material is first scheduled to be tested on either an exam or a quiz. Quiz material should be covered during the lectures and discussion sections just before the quiz. You are responsible for the material even if the University closes on the day of the discussion section. It is a good idea to look over all material before it is covered in the lectures.

These assignments are subject to changes announced either in class or on this webpage.

## Homework Assignments

Assignments on Topics Covered on the First Exam (Tuesday, 27 September)

• Quiz on Thursday, 8 September (Classification, Linear, Separable)
Boyce and DiPrima (BD) Section 1.3 --- 1-7, 9, 11, 17
BD Section 2.1 --- 3c, 6c, 9c, 12c, 15, 30-33
BD Section 2.2 --- 1-4,6-19, 22, 23
BD Section 2.4 --- 3, 6, 9, 12, 15, 22

• Quiz on Thursday, 15 September (Graphical Methods, and Applications)
BD Section 1.1 --- 16, 18, 20, 26, 29, 31
BD Section 2.3 --- 2, 3, 5, 9, 10, 11, 13, 16, 23
BD Section 2.5 --- 1, 3, 5, 7, 9, 13, 20, 23

• Quiz on Thursday, 22 September (Numerical Methods)
BD Section 8.1 --- 1, 7, 9, 23
BD Section 8.2 --- 1, 7, 9, 14
BD Section 8.3 --- 1, 7, 9
BD Section 2.6 (Exact Equations) --- 1, 2, 3, 4, 5, 6, 7, 8, 9

• Exam on Tuesday, 27 September (Exact Equations and Integrating Factors)
BD Section 2.6 --- 13, 22, 25, 27

Assignments on Topics Covered on the Second Exam (Thursday, 1 November)

• Quiz on Thursday, 6 October (General Homogeneous)
BD Section 3.1 --- 1, 3, 5, 7, 9, 13, 17, 23
BD Section 3.2 --- 1, 3, 5, 8, 11, 13, 16, 24, 25
BD Section 4.1 --- 1, 4, 5, 11, 15, 17, 21 ,23

• Quiz on Thursday, 13 October (Constant Coefficient Homogeneous)
BD Section 3.3 --- 1, 3, 5, 7-14, 17-22
BD Section 3.4 --- 1-7, 11, 12, 15, 19, 20, 21, 23-28
BD Section 4.2 --- 12, 19, 32

• Quiz on Thursday, 20 October (Constant Coefficient Nonhomogeneous: Undetermined Coefficients)
BD Section 3.5 --- 1, 3, 5, 9, 11, 13, 17, 21, 28
BD Section 4.3 --- 1, 2, 5, 9, 11

• Quiz on Thursday, 27 October (General Nonhomogeneous: Variation of Parameters; Mechanical Vibrations)
BD Section 3.6 --- 1, 5, 9, 13, 15, 17, 19, 23, 28
BD Section 4.4 --- 3, 10, 15
BD Section 3.7 --- 1, 5, 7, 9, 11

• Exam on Tuesday, 1 November (Mechanical Vibrations)
BD Section 3.8 --- 5, 6, 7, 18, 19

Assignments on Topics Covered on the Third Exam (Tuesday, 6 December) and the eleventh quiz if administered

• Quiz on Thursday, 10 November (Laplace Transform)
BD Section 6.1 --- 1, 2, 3, 5, 6, 9, 11, 13, 17
BD Section 6.2 --- 1, 3, 5, 9, 11, 15, 19, 21, 23
BD Section 6.3 --- 1, 3, 5, 11, 15, 17
BD Section 6.4 --- 1, 2, 3, 5, 6, 9, 10, 11

• Quiz on Thursday, 17 November (General Linear Systems and Systems with Constant Coefficients)
BD Section 7.1 --- 1, 3, 7, 9, 17, 22
BD Section 7.2 --- 2, 4, 6 (you may use Matlab), 10, 11, 23, 26
BD Section 7.3 --- 1, 4, 28
BD Section 7.4 --- 6, 7
BD Section 7.5 --- 1, 5, 9, 11, 16, 18, 24, 29

• Quiz on Tuesday, 29 November (Linear Systems with a Constant Coefficient Matrix)
BD Section 7.3 --- 15, 17, 19, 21
BD Section 7.6 --- 1, 2, 3, 4, 5, 9, 10, 13, 20
BD Section 7.7 --- 1, 3, 4, 5, 7, 8, 9, 11
BD Section 7.8 --- 1, 3, 5, 7, 9

• Quiz on Tuesday, 13 December (Phase Portrait Classification for Linear and Nonlinear Planar Systems) - if administered.
BD Section 9.1 --- 3, 5, 7, 9, 11, 13, 15, 17
BD Section 9.2 --- 2, 4, 6, 8, 19
BD Section 9.3 --- 1, 3, 5, 7