21-260: Edits to Online Assignment #2

I need to make some comments and clarifications about this week's online assignment.

1. First, you need to find a differential equation, but you do not need to solve it! Also, I give you information that leads to an initial condition. You should enter an initial value problem (i.e. a differential equation with an initial condition) as your answer. I've updated the question to reflect this.
2. When I wrote this problem, I made a mistake that has caused the interest rates to be very small. That's okay, though. We can live with that. Also, I accidentally wrote "mayment" instead of "payment." Finally, the numerical value of k that you enter should be in units of [$ per year]. Your answer should be to the nearest dollar. Blackboard won't let me make these corrections/updates in the problem, though.
3. This is a linear differential equation, which we will discuss in class tomorrow. If you work out the answer to 2 decimal places, you should be okay.
4. Same as for problem 3.

21-260: Edits to Online Assignment #1

I've made a couple corrections to the problems on Wednesday's online assignment. I know some of you (75 according to Blackboard) have already attempted these problems, but I don't think should create too many problems. Here are the changes I've made:

1. In problem #4, I've changed "dy/dx" to "dy/dt", since the variable on the right hand side of the equations is t, not x.
2. In problem #5, I've changed "f(t)" to "f(x)", since the independent variable in the differential equations is x.

21-260: Final Exam

I've posted a review page for the Final Exam. You can follow the link from the Schedule page.

21-260: Week #15

The reading and homework assignments for Week #15 have been posted. You can follow the link from the Schedule page.

Hello World!

Conor Thomas Handron was born at 6:10am on Monday, November 26.

21-260: Week #14

The reading and homework assignments for Week #14 have been posted. You can follow the link from the Schedule page.

21-260: Week #12

The reading and homework assignments for Week #12 have been posted. You can follow the link from the Sceudule page.

21-260: Week #11

The reading and homework assignments for Week #11 were posted a few days ago. Sorry for not announcing it here before now. You can follow the link from the Schedule page.

21-260: Week #10

The reading and homework assignments for Week #10 have been posted. You can follow the link from the Schedule page.

21-260: Week #8 Solutions

I've posted the solutions to HW#8. You can find them on the "Solutions" page of the Blackboard site.

21-260: Exam #2 Review

Three of the problems listed from the textbook ought not to have been. Problems 7.1.2, 7.1.4 and 7.1.6 all deal with second order differential equations, which we have not yet covered. You can safely ignore them. Also, I will hold a review session this evening from 6:30-8:00 in PH 100.

Exam #2 Review Problems

I've added another large collection of review problems to the exam review page linked from the Schedule page. Also, be sure to look at the homework solutions posted on the Blackboard site.

21-260: Week #8

The reading and homework assignments for Week #8 have been posted. You can follow the link from the Schedule page.

21-260: Week #7

The reading and homework assignments for Week #7 have been posted. Follow the link from the Scheule page.

21-260: Week #6

The reading and homework assignments for Week #6 have been posted. You can follow the link from the Schedule page.

21-260: Week #5

I've posted the reading and homework assignments for Week #5. As I mentioned in class, there is no written assignment this week. There is an online assignment. I said in class that it would be due on Friday, but I've changed the deadline to Sunday evening, because... Well because there was no reason not to.

You can follow the link from the Schedule page.

21-260: Study Break

Engines of our Ingenuity.

21-260: Exam Strategy

I just responded to a student email asking about studying for the exam, and what type of exam you can expect. This is what I wrote:

I would say that working through practice problems is the best way to prepare. You should also review your class notes, and especially your graded homework. When you are working problems, keep track of things you need to look up or ask about. Those are things you should focus on as the exam date gets closer (as it is now!)

On the day of the exam, I would recommend taking a couple minutes to read over the whole exam. Sort out which problems look easy, and which look more challenging. Finish the easiest problems first, leaving you more time to think about the harder problems without distractions.

Regarding the makeup of the exam. You can expect 20-25% of the exam to be pretty straightforward, and another 20-25% to be pretty challenging. The rest somewhere in between. There will be some conceptual material, like on the written homeworks, but most of the exam will be more computational.

Chris Potter's office hours

My office hours this week will be in Wean 6201:

Mon 4-6pm
Tue 2-4pm
Wed (none)
Thu 4-5pm

21-260: Exam Odds and Ends

As announced in class today, our first midterm is this Wednesday from 7:30-8:20 in UC McConomy. There will be no class on Wednesday. I will hold a review session tonight from 6:30-8:00 in PH 100.

I've added "Systems of Differential Equations (Section 7.1)" to the list of topics covered. That is what I've been telling people all along, but I inadvertently left it off the list. I also added 7.1.23 to the practice problems from the text.