MATH 4200 Midterm: MATH 4200 LSU f07 Exam 1a

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31 Jan 2019
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Answer each of the questions on your own paper, and be sure to show your work so that partial credit can be adequately assessed. Put your name on each page of your paper: [15 points] (a) find the quotient q and remainder r when 525 is divided by 231. 525 = 2 231 + 63 so q = 2 and r = 63. (b) calculate the greatest common divisor d = (525, 231) by the euclidean algorithm. 7 (c) using part (b), write d in the form s 525 + t 231 for some integers s and t. From the rst row of the last matrix in part (b), 21 = 4 525( 9) 231: [14 points] (a) find all solutions to the congruence 32x 7 mod 101. The identity which may be useful, can be assumed. 1 = 13 101 41 32,

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