Write the first six terms of the sequence. 37. an = 2n - 4 a. -4, -2, 0, 2, 4, 6 -2, -6,-10, -14, -18, -22 b. -2, 0. 2, 4. 6. 8 d. 0. 2, 4, 6, 8, 10 Describe the pattern, write the next term, and write a rule for the ath term of the sequence. 38. -15, -24, -33, -42,... a. geometric, a, - -60, a, - -9 - 6 b. arithmetic, as - -60, a, - -6n - 9 C. arithmetic, as - -51, a, - -9 - 6 d. geometric, as - -51, a, - -6 - 9 Find the sum. 39 a. 2 C. 55 b. 13 d. 15 40. a. 56 C. 88 b. 144 d. 72 41. You enjoy reading in your free time and keep every book you have ever read. When you were five, you read 2 books and every year after you tripled the number of books you read. How many books did you have in your bookcase when you were 11 years old? a. 2186 books c. 1093 books b. 35 books d. 266 books 42. Write a rule for the with term of the sequence. Then find a,. -1,--.-. b. 2 in- Write a rule for the wth term of the arithmetic sequence. 43. 16 - 69, a 19 - 81 a. a, - 5n +4 c. a, -4n +9 b. a, - 4n + 5 d. a, - 5n+9 44. a 16 - -44.6, dy - -69.4 a. a, =-3.12+5 c. a, - 5n - 3.1 b. a, = -3. 12 + 1.9 d. a, - 5m + 1.9 45. Write a rule for the ath term of the sequence. Find ag . 8, -32, 128, -512 a. a, - 8(-4)"-, as - 32, 768 C. a, - -4(8)*-1, a6 - 32, 768 b. a, = -4(8)"-1, de = -8, 192 d. a, = 8(-4)"-1, a. = -8, 192 Write a rule for the ath term of the geometric sequence. 46. a, = -16, as = = a. a, - 64 -- C. a, - -- (64)" b. a, - 64 -4 d. a, - --(64)"-1