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18. Evaluate En=1(3n + 1) a. 21 b. 50 c. 69 d. 34 19. Evaluate E. (27 - 3) a. 108 b. 47 c. 233

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18. Evaluate En=1(3n + 1) a. 21 b. 50 c. 69 d. 34 19. Evaluate E. (27 - 3) a. 108 b. 47 c. 233 d. 18 20. What is the second term of a geometric sequence where a1 = 8 and r = 3? a. 216 b. 72 c. 24 d. 648 II. COMPLETION. Fill in the missing three terms of each sequence on the blank provided. (3 points each) 21. 4, 8, 12, 16, 20, 22. 1 3, 1, 7,2' 23. 7, 21, 63, 189, 24. 5, -10, 20, -40, 25. 2, 1, 7, 7' III. SOLVING. Determine the type of conics each equation represents using the discriminant. (5 points each) 26. x2 - y2+4=0 27. 4x2 + y2 + 24x - 4y + 36=0 noloubid a 28. 8x2 - 3y2 - 4x - 4y + 7=0 29. 3x2 + 2x + 3y +18=0 -b

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