Worksheet A: (Topic 2.1) Arithmetic and Geometric Sequences Name: Sol Mcokes Directions: For each of the following, determine if the given sequence is arithmetic, geometric, or neither, 1. 12, 7, 2, - 3, - 8, ... 2. 5, 10, 20, 40, ... 3. 20, 10, 5.2 arithmetic g cometric * 3'7. ... 5, 1, 1, 2, 3, 5, 8, 13, ... 6. b =1$3 0 1 1 2 35 2 Neither Directions: Let a, be an arithmetic sequence with the following properties. For each of the following, find an expression for a, , and then find a . 7. ; =7 and as =17 8. a, = -3 and a =-9 and Itzhi(n- ") 9n = a, = 2-3d ( 3 - 8 ) a1= - 3 3 1: 17-5d 9. as =7 and d =-4 10. a, = -1 and d = 2 Gn = 27- An an = = 3+ 3 91 1= -17 911 = 13 11. an 12. an 11 109 10 11 5 6 7 - n an = Go- Sn 91 1=- 27 Created by Bryan Passwater Arithmetic and Geometric Sequences Worksheet A: Topic 2.1