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Course: MATH 240, Fall 2009
School: McGill
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Word Count: 199

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5 Assignment Part I Tibor Szab o MATH 240, Fall 2008 Discrete Structures I The corresponding quiz (including also Part II of the assignment, that is published on November 12th) takes place on November 19th. Reading assignment: Sections 6.1-6.5 of the yellow book. YOU ALWAYS NEED TO SHOW YOUR WORK. Final answers with no or insucient explanation will receive no creadit, even if they are correct. Exrecise 0. Write...

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5 Assignment Part I Tibor Szab o MATH 240, Fall 2008 Discrete Structures I The corresponding quiz (including also Part II of the assignment, that is published on November 12th) takes place on November 19th. Reading assignment: Sections 6.1-6.5 of the yellow book. YOU ALWAYS NEED TO SHOW YOUR WORK. Final answers with no or insucient explanation will receive no creadit, even if they are correct. Exrecise 0. Write down the denition of a divides b. Exercise 1. Prove that if c = 0 ac|bc then a|b (Do not use anything we proved in class, just the denition of divisibility.) 2. Exercise Prove that if a|b and a|c, then a|b2 + 3c + 2b c. (Do not use anything we proved in class, just the denition of divisibility.) Exercise 2. Show that for any integers a Z and ,k, n N (i) a 1 divides an 1. (ii) ak 1 divides an 1 if k|n. (iii) ak 1 divides an 1 only if k|n. Exercise 4. Show that a number wi...

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Concordia Canada - MECH - 443
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McGill - MATH - 240
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