20 26. What is the 8 term in the sequence 200, 100,50, 25,...? 25 A B 25 25 32 13 A씀 1 what is the common 27 In the geometric sequence, 54, -18.6, ratio? A. - B. c. D를 2 28. What is the positive geometric mean between 4 and 100? A 10 B. 20 C.30 D.40 29 Which of the following is NOT a root of x (x+3)(x + 3)(x - 1) (2x + 1) = 0? + 1.0 N.21 A. i only B. i only C. i and is only D. ili and iv only 30. What is a factored form of P(x) = x4 + x + x2 + x? A. (x) (x + 1)(x + 1) C. (x) (x - 1) (x² + 1) B. (*) (1) (x + 1) D. (x) (-1) (x + 1) 31. Which of the following is a polynomial? i x + 2x2 + 5x + 2 ii. 5x + 3x2 + x + 2 i 5x2 + 3x A. i only C. i and i B. ii only D. i and in 32. Which of the following is NOT a polynomial? A. y² - 4y + 5 C.3r - 5r+ 2r - 1 B.5x3 + 9x2 + 12x +8 D. a-b3 33. Which of the following figures illustrate an arithmetic sequence? A. C D. 山田
