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MA 221 Even Answers Please note that these answers were not worked out by myself and are hence only as accurate as the solution manual or my ability to copy from it. Lesson 1 (Part 1), Section 1.3, p. 12 6. x = 3 32. 4 x + 3 y + 1 = 0 Lesson 1 (Part 2), Section 1.7, p. 28 6. x 2 + y 2 4 x + 6 y + 11 = 0 16. ( x 4) 2 + ( y + 3) 2 = 5, center: (4 , 3), radius: 5 Lesson 2, Section 1.4, p. 21 6. y -intercept = 1, x -intercepts = ± 2 2 , symmetry: y -axis, asymptotes: none, extent: all x 1 1 1 1 10. intercepts: origin, symmetry: x -axis, asymptotes: none, extent: x 0 1

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2 1 0 1 2 1 2 24. intercepts: y = 0, x = 0, symmetry: none, asymptotes: x = 2, y = 1, extent: x n = 2 1 1 2 3 4 1 2 3 1 2 3 Lesson 3 (Part 1), Section 1.8, p. 33 20. focus: (2 , 0), directrix: x = 2
3 1 2 3 1 2 1 2 3 4 1 2 3 4 b Lesson 3 (Part 2), Section 1.9, p. 39 4. vertices: (0 , ± 3), foci: (0 , ± 5), length of semiminor axis is 2 1 2 1 2 1 2 3 1 2 3 b b

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