38-1E-10S - Mathematics 38 Differential Equations...

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Mathematics 38 Differential Equations Examination 1 February 18, 2010 No calculators, notes, or books are allowed. Please make sure all electronic devices are turned off and out of sight. Show all work and cross out work you do not want graded! Remember to sign your blue book. With your signature you are pledging that you have neither given nor received assistance on this exam. Good luck! Please put the answers to problems 1–10 on the blue book cover in the corresponding box, as shown here: 1. (5 points, answer only, no partial credit) Can the system below be solved by Cramer’s rule? x +2 y + z = 0 3 x +6 y +3 z = 0 - x + z = 0 2. (5 points, answer only, no partial credit) Consider the following system of equations: x +2 y + z = 0 2 x - y +3 z = 0 2 x - 6 y +4 z = 0 Choose one answer: The system has a. a unique solution, b. no solution, c. more than 1 solution. d. None of the above. 3. (5 points, answer only, no partial credit) Choose one answer. det
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This note was uploaded on 10/29/2010 for the course MATH MATH38 taught by Professor Hasselblatt during the Fall '10 term at Tufts.

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38-1E-10S - Mathematics 38 Differential Equations...

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