Office: Padelford C-543
Office hours
sections CA and CC
aleksand [at] math.washington.edu
| Wed. | 2:30-3:30 pm | Padelford C-113 |
| Thu. | 2:30-3:30 pm | Padelford C-113 |
section CB
dbm25 [at] math.washington.edu
| Tue. | 10:30-11:20 am | MSC |
| Thu. | 10-10:50 am | MSC |
The grade record has been updated with your final exam scores and course grades. These your actual course grades.
If you'd like to see your exam, you can stop by my office hours after the start of Spring quarter. Office hours will be posted here after the start of the quarter.
Here are some stats on the final exam:
| 1st quartile | 52 |
| median | 67 |
| 3rd quartile | 78 |
Have a good break!
A correction: the center of mass in problem 10 on the Autumn 2004 final exam is in fact at the point (7/9,5/9).
The grade record has been posted.
Here are some stats on the exam:
| 1st quartile | 47.25 |
| median | 63.5 |
| 3rd quartile | 79.75 |
| max | 97 |
Here are some approximate grade translations:
| 45 | 0.8 |
| 50 | 1.3 |
| 55 | 1.8 |
| 60 | 2.4 |
| 65 | 2.8 |
| 70 | 3.1 |
| 75 | 3.3 |
| 80 | 3.5 |
| 85 | 3.7 |
| 90 | 4.0 |
Solutions to the exam are available at the "old exams" link on the right, under Resources. There were two version: if your problem 1(a) involved a 23-rd power, that was version A.
Here's an animation I made to make the topic center of mass come to life, or something.
Hit reload if nothing seems to be happening. Browsers can be funny.
A comment about the second midterm and final: On the second midterm and final, you can expect to be asked to evaluate some integrals. Since notesheets are allowed, I want to make it clear what sort of work needs to be shown. For integrals found in the table on p. 406 of your text, you need not show any work (indeed, there is no work to be shown). Also, the integrals of tan x, sec x, csc x, and cot x may all be used without supporting work. All other integrals require work to be shown. Feel free to have lots of integrals on your notesheet so you can check your work, but credit will not be given where work is not shown.
Here's the Integral Handout from today's lecture. Here's the solutions.
I strongly recommend working on the integrals before looking at any of the solutions. Keep in mind that the exam will not have answers in the back (or anywhere else, until, of course, you create them...).
Midterm 1 grade data:
| min | 18 | |
| 1st quartile | 36.5 | |
| median | 42 | |
| 3rd quartile | 50 |
| score | grade |
| <30 | 0 |
| 30 | 0.8 |
| 35 | 1.6 |
| 40 | 2.5 |
| 45 | 3.0 |
| 50 | 3.5 |
| 55 | 4.0 |
| 60 | 4.0 |
Midterm One solutions are here:
version A (problem 5b- volume is 1)
version B (problem 5b- volume is 2)
The extra credit problem (linear density of mining cable) has been completed.
I may give other extra credit problems if I can come up with them.
In preparation for the next week's midterm exam, you might want to take a look at old 125 exams. You can check out the materials website (link at right). There is only one of my old exams there. For all the rest, click here.
Before anyone asks, solutions to the exams that have none won't be added. There's plenty with solutions to keep you busy.
I've set up a class discussion board. Feel free to use it to discuss anything about the course. I'll check it periodically (more often if I notice people using it a lot), but if you want a quick response from me please email me directly.
Here is the solution to the falling example we did in class on Monday. Try finishing it yourself before looking at his solution.
Since lecture was cancelled for today (Wednesday, Jan 5) I've modifed the homework assignment for Friday. Just parts 1 and 4 of the week 1 assignment are due on Jan 7.
Arggh! I found out this afternoon that the version of the required text listed on the class syllabus I handed out today is incorrect. You need the 5th edition of the text, not the 4th as listed. If you had 124 last quarter, then you're okay, but if not, be sure you have the 5th edition.
Also, just so it's clear, there are two books that satisfy the requirements for the course:
Book 2 is simply the first 11 chapters of book 1, so it's lighter and cheaper, but you'll need those later chapters for Math 126.
Welcome to Math 125 section C, Winter Quarter 2005!
Keep checking this site - there will be lots
of useful stuff available here over the course of the
quarter.
Grade Record
Homework Schedule
Class discussion board
Course syllabus (pdf)
Math 125 Materials Website
Dr. Conroy's Old Math 125 Exams
Math Study Center
Student Counseling Center
Information for Students
of International TAs
Center for Learning
and Undergraduate
Enrichment (CLUE)