Winter 2012 Kronenthal Math 210 Section 011 Homework 6

Winter 2012 Kronenthal Math 210 Section 011 Homework 6 Due Date: Tuesday January 24 by 11:00 am A few reminders: Before attempting these graded problems be sure to try the ungraded questions; they might help you with these problems. Your homework must be written neatly explained completely and stapled if you turn in more than one piece of paper. Problems must be presented in order. Work not satisfying these criteria will be penalized. You are welcome to discuss the mathematics behind the homework with others but you must write the answer to each problem by yourself. 1. Do exercise number 30 in section 4.3 (page 124) of the textbook. (The end result of this exercise is proving that if a; b > 0 are integers then gcd(a; b) lcm(a; b) = ab.) 2. Find all integers x and y 0 x; y

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