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MATH 254 HW 3 - Most of these are strictly...

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MATH 254, F ALL 2009 H OMEWORK 3 D UE T HURSDAY , S EPTEMBER 24 TH This assignment is due at the beginning of class, Thursday, 9/24/09. You must bring a copy to class—it can be typed or neatly hand-written. If necessary, add illustrations by hand or with computer graphics. Late homework is not accepted. Read the directions carefully. For every question that asks you to “justify your answer,” a simple calculation or response without explanation is not sufficient. Make your arguments understandable and convincing. B OOK Q UESTIONS The concepts we have hit on in class represent multiple sections in your textbook: sections 1.1, 1.2, 1.4, and 1.5. I have chosen a few of the exercises that are “doable” for us at this stage. We will continue working and most likely have homework from these sections again next week.
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Unformatted text preview: Most of these are strictly calculation-oriented questions. 1. Section 1.1, #10 (p. 11) 2. Section 1.1, #12 (p. 11) 3. Section 1.4, #6 (p. 47) 4. Section 1.4, #8 (p. 47) 5. Section 1.4, #12 (p. 47) 6. Section 1.4, #14 (p. 48) 7. Section 1.4, # 26 (p. 48) 8. Section 1.5, #34 (p. 56) O THER Q UESTIONS Designing a Linear System : For each of the following, find values of h and k so that the linear system represented has (if possible) a. No solution b. One solution c. Infinitely many solutions Justify your answers. 1. x + hy = 2 4 x + 8 y = k 2. x h 3 + y 2 k = 3 7 3. 1 2 3 6 h k 4. h 2 k 1 3 7...
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