A few recurring errors that we noticed in the first homework...
| 28. | The solution gave one way to do the problem. Another way is using Theorem 1.6 (or disjunctive normal form), so you only need to prove that "or" can be expressed in "not" and "and". But many students forgot to refer to this theorem and directly get the conclusion. That's wrong. | ||
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| 42b. |
A number of students made arguments that (essentially) had this form:
Note that this really boils down to saying, "if Carlos did it (I), then Carlos did it (III)." ...In general, it's invalid to assume what you're trying to prove. |
Also, a few of the details of how points were allocated, recorded, etc....
Each of Homework #1's seven problems was worth 5 points. You should be able to find the corresponding seven scores on the front page of your homework, arranged as follows:
[So, if you see...
...at the top of your assignment, then you received a score of 4/5 on exercise 42b, 3/5 on exercise 28, 3/5 on exercise 29, and 5/5 on the rest.]
Your total score (out of 35) should also appear prominently on the front page.
Our solutions for the first homework have been posted.
For those who are curious, the median score was 31, and the mean score was 30.1 (sigma ~ 4).