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Unformatted text preview: 18.03 Problem Set 9 Fall 2009 Due in boxes in Room 2-106, Monday Nov 30 at 3:00 p.m. You may and should discuss the problems with other students, but you must write solutions entirely on your own. (The main reason for this requirement is that we enforce it so strictly on exams.) Question Zero is required for your problem set to count. 0. On the first page of your homework, list the individuals (other than recitation leaders, lecturer, and math department tutors) with whom you discussed the homework; and list the sources (other than the class text, web site, and supplementary notes) that you consulted. This will look like, Consulted with Jane Doe; consulted text The scientific papers of J. Willard Gibb , or No consultation. Collaboration is good, and finding things to read is good. 1. (25 points) There are three kinds of people in the world 1 : students, professors, and workers. Let us denote the population of each kind at time t by S ( t ) = number of students at time t, W ( t ) = number of workers at time...
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- Spring '09