MATH 333 001 (70777) Assignment Page -- Fall 2007

Review-Problem Suggestions for the Final Exam
Posted: Fri Dec 14 05:13:09 MST 2007

The Rev4 link above points to a list of suggested odd-numbered problems for use in preparing for the final.

The final is Monday, 12/17/07, at 8 AM in our usual classroom.

Assignment #20 (Due Wednesday, 12/12/07)
Posted: Mon Dec 10 15:50:31 MST 2007
Grading Notes Posted: Thu Dec 13 17:35:27 MST 2007

Not-to-hand-in part:

• 5.2: odds 1-21, 41, 43, 45

To-hand-in part:

• 5.2: 4, 6, 10, 14, 18, 19, 40, 44
• 5.3: 22

Grading Notes.

Assignment #19 (Due Friday, 12/7/07)
Posted: Tue Dec 4 17:57:39 MST 2007
Grading Notes Posted: Sun Dec 9 19:00:04 MST 2007

Not-to-hand-in part. Raise questions at the start of class if your answer doesn't agree with the BOB answer. You can give us all a head start on answering questions if you start writing up the question on the board before class.

• 4.8: 15 (one can eyeball all the eigenstuff)

To-hand-in part:

• 4.8: 16
• 4.8: 33 except change IC: Q₂(0)=20

Grading Notes (3-MB file!)

Test #3 Review Notes
Posted: Wed Nov 28 06:11:01 MST 2007

If you click on the link Rev3 in the link strip above, you will be put in touch with a growing set of review notes for Test #3.

Test #3 is this Friday, 11/30/07.

Assignment #18 (Due Tuesday, 11/27/07)
Posted: Mon Nov 19 18:55:46 MST 2007
Grading Notes Posted: Tue Nov 27 18:53:28 MST 2007

To-hand-in part:

• 4.5: 6, 10 (three-by-three IVPs)
• 4.5: 14 (assume that r/V = 1 for now)

Grading Notes

Assignment #17 (Due Wednesday, 11/14/07)
Posted: Mon Nov 12 18:01:29 MST 2007

To-hand-in part:

• 4.4: 2, 4, 8 (find eignevalues only)
• 4.4: 12, 14 (solve many-solution systems)

Assignment #16 (Due Friday, 11/9/07)
Posted: Tue Nov 6 09:29:59 MST 2007
Grading Notes Posted: Mon Nov 12 10:00:03 MST 2007

Not-to-hand-in part. Raise questions at the start of class if your answer doesn't agree with the BOB answer. You can give us all a head start on answering questions if you start writing up the question on the board before class.

• 4.1: 29, 31 (in class, 11/6/07, we had constant volumes)

To-hand-in part:

• Consider the system on page 213 of our text book. Carry out the following
  1. Compute the inverse of the coefficient matrix. Show the steps for any by-hand method you use.
  2. Show a by-hand check that your inverse is correct.
  3. Write the system's solution using the inverse you've calculated ("TI-81 method").
• Attempt to carry out the above steps for the system whose coefficient matrix is the matrix at the top of page 243 and whose right-hand-side column is the vector x₃ in the middle of page 244.
  1. For whatever by-hand inverse-finding method you choose, show the steps and explain briefly what intermediate result tipped you off that no inverse exists.
  2. Nevertheless, write the systems's solution.
• 4.1: 30

Grading Notes

Assignment #15 (Due Wednesday, 11/7/07)
Posted: Fri Nov 2 10:07:34 MDT 2007
Problem 3.11: 22 replaced by 3.10: 10 Sat Nov 3 07:57:31 MDT 2007
Grading Notes Posted: Mon Nov 12 09:59:27 MST 2007

To-hand-in part:

• 3.10: 6, 8, 10
• 3.11: 6

Grading Notes

Assignment #14 (Due Monday, 10/29/07)
Posted: Tue Oct 23 15:17:28 MDT 2007

To-hand-in part:

• 3.8: 2, 6, 14
• 3.9: 2, 4, 6

Test #2 Review Notes
Posted: Sun Oct 21 17:24:56 MDT 2007

If you click on the link Rev2 in the link strip above, you will be put in touch with a growing set of review notes for Test #2.

Test #2 is this Friday, 10/26/07.

Assignment #13 (Due Monday, 10/22/07)
Posted: Fri Oct 19 08:53:29 MDT 2007
No-to-Hand-In Part Fixed: Sun Oct 21 14:52:02 MDT 2007

Not-to-hand-in part. Raise questions at the start of class if your answer doesn't agree with the BOB answer. You can give us all a head start on answering questions if you start writing up the question on the board before class.

• 3.8: 23, 25, 27, 29 ask you to determine the differential equation from the givens. This trick enables our Friday shortcuts.
• 3.8: 37 (matching!!)

To-hand-in part:

• 3.6: 2
• 3.7: 2, 6, 14

Assignment #12 (Due Monday, 10/15/07)
Posted: Thu Oct 11 17:28:01 MDT 2007
Grading notes Posted: Wed Oct 17 09:07:11 MDT 2007

Not-to-hand-in part. Raise questions at the start of class if your answer doesn't agree with the BOB answer. You can give us all a head start on answering questions if you start writing up the question on the board before class.

• 3.4: 1-9 odds
• As far as reduction of order is concerned, pick one of the above and use reduction of order to find the multiplied-by-t solution.
• 3.5: 3-11 odds
• 3.5: 23, 25
• 3.5: reconstruct the IVP: 27, 29, and 13-21 odds

To-hand-in part:

• 3.4: 2, 4, 20
• 3.5: 6, 8
• 3.5: 16 (no decimal approximations allowed)

Grading Notes

Friday 10/12/07 In-Class Quiz
Posted: Fri Oct 12 17:08:17 MDT 2007

Questions here. Answers here, maybe.

Grading Notes for Assignment #11 Are Posted
Posted: Thu Oct 11 14:43:30 MDT 2007

Check below for a link. I must apologize: they look pretty awful.

Grading Notes for #7 and #10 Have Been Posted
Posted: Sun Oct 7 16:41:39 MDT 2007

Check below for links to these notes.

I know it's really hard to believe, but your instructor may have made an error in grading one of the #7 problems.

Assignment #11 (Due Wednesday, 10/10/07)
Posted: Fri Oct 5 18:09:08 MDT 2007
Grading Notes Posted: Thu Oct 11 14:34:56 MDT 2007

These depend on the characteristic-equation stuff in 3.3 (to be covered in class Monday) and the Euler's Formula stuff covered in class on Friday, 10/5.

To-hand-in part:

• 3.3: 2, 6, 8, 18
• 3.5: 10 (yes, that's 3.5)

Click here for grading notes for this assignment.

Assignment #8 Grading Notes Posted
Posted: Thu Oct 4 11:59:50 MDT 2007

Check below for the #8 stuff.

Assignment #10 (Due Friday, 10/5/07)
Posted: Mon Oct 1 17:59:41 MDT 2007
Due Date Bumped to Friday: Tue Oct 2 08:42:50 MDT 2007
Grading Notes Posted: Sun Oct 7 16:37:51 MDT 2007

Not-to-hand-in part. Raise questions at the start of class if your answer doesn't agree with the BOB answer. You can give us all a head start on answering questions if you start writing up the question on the board before class.

• 3.2: odds 1-21, especially 5, 11, 15

To-hand-in part:

• 3.2: 4, 6, 8, 12

Click here for grading notes on this assignment.

Assignment #9 (Due Monday, 10/1/07)
Posted: Tue Sep 25 17:13:12 MDT 2007
Corrected and Enhanced: Thu Sep 27 16:13:48 MDT 2007

Check out section 10 on Two-by-Two Matrix Cramer in the writeup you can get to by clicking here. This assumes you know a little bit about matrix multiplication (covered in sections 1-9).

Attain some familiarity and competence with this method by using it to find the intersections of pairs of non-parallel oblique lines.

Assignment #8 (Due Monday, 10/1/07)
Posted: Tue Sep 25 17:08:17 MDT 2007
Grading Notes Posted: Thu Oct 4 11:59:34 MDT 2007

A little suite of physics problems partly concerned with knowing the difference between weight and mass. This model provides a good example for 2OLDEs. The problems:

3.1: 12, 13, 14

Click here for grading notes.

Test #1 Review Notes
Posted: Tue Sep 25 11:30:06 MDT 2007

If you click on the link Rev1 in the link strip above, you will be put in touch with a growing set of review notes for Test #1.

Test #1 is this Friday, 9/28/07.

Friday 9/21/07 In-Class Quiz
Posted: Fri Sep 21 09:04:29 MDT 2007

Questions here. Answers here, maybe.

Assignment #6 Grading Notes Are Posted
Posted: Thu Sep 20 17:47:34 MDT 2007

Check below for the grading notes. There should be lots of error sniping to do.

Assignment #7 (Due Wednesday, 9/26/07)
Posted: Thu Sep 20 17:45:30 MDT 2007
Due Date Bumped from Monday to Wednesday: Mon Sep 24 08:53:23 MDT 2007
Grading Notes Posted: Sun Oct 7 16:34:28 MDT 2007

Not-to-hand-in part. Raise questions at the start of class if your answer doesn't agree with the BOB answer. You can give us all a head start on answering questions if you start writing up the question on the board before class.

• 2.7: 1-9 odds (Be sure to get an explicit solution for problem 1)
• 2.8: 1-13 odds

To-hand-in part:

• 2.7: 4, 8, 10
• 2.8: 2, 4, 8, 18, 19

Click here for grading notes on this assignment.

Calculus-Precalculus Topics Review
Posted: Tue Sep 18 12:38:53 MDT 2007

Check out the Calc PreCalc Review button up above. It's a work in progress which will suggest topics to review, along with calculus-book references and Google stuff.

Assignment #5 Grading Notes Posted
Posted: Mon Sep 17 06:16:55 MDT 2007

Check below for the grading notes for Assignment #5.

Assignment #6 (Due Wednesday, 9/19/07)
Posted: Fri Sep 14 08:45:28 MDT 2007

Not-to-hand-in part. Raise questions at the start of class if your answer doesn't agree with the BOB answer.

• 2.6: 1-23 odds and 27

To-hand-in part:

• 2.6: 2, 6, 8, 16, 28, 30

Click here for grading notes on this assignment.

Assignment #5 (Due Friday, 9/14/07)
Posted: Tue Sep 11 15:36:00 MDT 2007
Grading Notes Posted: Mon Sep 17 06:12:34 MDT 2007
Small-file Grading Notes Posted: Mon Sep 17 11:59:07 MDT 2007

• Problems 1 and 2 in the problem set at this link.
• 2.2: 42
• 2.3: 2, 4

Click here for grading notes for Assignment #5.

Click here for a rescanned smaller-file version.

Assignment #4 Grading Notes Posted
Posted: Tue Sep 11 10:39:07 MDT 2007

Check below for grading notes on Assignment #4.

Assignment #3 Key Posted
Posted: Mon Sep 10 17:11:58 MDT 2007

Check below for the #3 key.

Direction-Field Java Aplet
Posted: Fri Sep 7 16:27:12 MDT 2007

This demos direction fields and how solution curves follow them for simple differential equations of form y' = f(t,y):

http://www.ies.co.jp/math/java/calc/DiffEqu/DiffEqu.html

It seems to require that you be on a Windows machine.

Assignment #4 (Due Monday, 9/10/07)
Posted: Wed Sep 5 09:00:55 MDT 2007
Due Date Bumped to Monday: Fri Sep 7 15:05:50 MDT 2007
Grading Notes Posted: Tue Sep 11 10:37:03 MDT 2007

• 1.3: 14-21 all
• 2.2: 2, 4, 8  (also give the largest interval a < t < b on which Theorem 2.1 guarantees the existence of a unique solution)
• 2.2: 28, 40

Click here for grading notes for assignment #4.

Web-Site Quiz Key Posted
Posted: Fri Aug 31 08:49:01 MDT 2007

Click here for an answer key?

Assignment #2 Grading Notes Posted
Posted: Thu Aug 30 10:12:52 MDT 2007
Heading Fixed: Thu Aug 30 12:08:45 MDT 2007

Click here for notes and solutions for Assignment #2.

There should be lots of errors for extra-credit sniping.

Assignment #3 (Due Tuesday, 9/4/07)
Posted: Wed Aug 29 08:57:36 MDT 2007
Answer Key Posted: Mon Sep 10 17:10:27 MDT 2007

Click here for Linear-Algebra Problem Set #1 about GJ.

Click here for putative answer key.

Gauss-Jordan Writeup
Posted: Mon Aug 27 17:45:58 MDT 2007

Click here for a writeup with worked examples on the Gauss-Jordan Elimination for systems of many equations in many unknowns.

Assignment #2 (Due Wednesday, 8/29/07)
Posted: Sun Aug 26 18:14:53 MDT 2007

Problems from the text to hand in:

• 1.2: 6, 10, 11, 12, 16, 17, 18

Assignment #1 (Due Wednesday, 8/29/07)
Posted: Sun Aug 26 18:12:31 MDT 2007
Web Quiz Posted: Mon Aug 27 09:01:15 MDT 2007
Hand-in note added: Mon Aug 27 10:21:43 MDT 2007
Due Date Bumped to Wednesday: Tue Aug 28 08:51:15 MDT 2007

Do up the web-site quiz (both sides). Hand it in.

Click here for a copy.

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