Hi everyone,
If you picked up your (graded) written work from Chapters 4 and 5 today, please bring it with you on Thursday to class — I need to record your score in my gradesheet, or you will not get credit for the assignment. Ā Oops!
Thanks,
Prof. Reitz
Hi everyone,
First, the answer key for the Exam 2 review is now complete (it follows the questions in the Review document). Ā Second, you will notice that there are a few places (especially in problems 8 and 12) that I use basic facts aboutĀ remainders when one number is divided by another. Ā These are facts that you understand intuitively from working with dividing numbers, but it might help to have them stated explicitly. Ā This is the basic fact about dividing and remainders:
Fact (The Division Algorithm). Ā Given two integersĀ a andĀ b with 
What does this mean? Ā It expresses the fact that when we divide one integerĀ a by another integerĀ b, and it will go in some number of timesĀ qĀ with a remainder ofĀ r. Ā The remainder rĀ must be less than the numberĀ b that we are dividing by. Ā If the remainder is zero, then b dividesĀ a (becauseĀ 
If you have any questions, feel free to leave a comment here. Ā Best of luck with your studying!
-Prof. Reitz
Posted in Uncategorized
Tagged announcement, division, division algorithm, exam review, remainder, update
Hi everyone,
In the homework from today, the final two problems (#15, 16) use an idea called “Proof by cases” (considering different possible situations within your proof). Ā Ā To complete these two problems, read Page 96 (starting with “4.4 Cases” and ending at the end of the first proof, at the bottom of the page). Ā Bring your questions on Thursday!
-Prof. Reitz
Hi everyone,
Office hours today will be from 12pm-1pm (I will also be able to answer a quick question or two right after class).
-Prof. Reitz
Hi everyone,
A number of you have pointed out that our site is having problems – I’ve submitted a bug report, and will keep you posted. Ā Don’t worry – if it’s not resolved soon I’ll extend the deadline for OpenLab assignment #2.
Sorry for the trouble!
Prof. Reitz
This review sheet is rather long – because of this, I’ve marked certain problems Ā as optional (denoted with a double asterisk **). Ā If you have only a limited time for review, do the other problems first. Ā If you have a little extra time, the ** problems are good practice.
Optional Problems: Ā 1b, 2d, 4bf, 5efij, 6ae, 7c, 8d, 10a, 12b
Hi everyone,
Due to several meetings (the curse of a big institution), my regularly scheduled office hours will be all messed up today. Ā I’ll be available:
– Directly after class for about 12 minutes (until 11:27)
– From 12:30-1:00
If need more time with me, please let me know either at the end of class or by email, and I’ll do my best to find a time that works
.Apologies for the late notice,
Prof. Reitz
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