21. 22. Find the sum of the following geometric series. 23. ; 24. = 15 1000 + 500 + 250 + 125 + ... ; = 20 n n 25. 26. Answers 1. geometric, r = 4, a6= 3072 2. arithmetic, d = 2, a6 = 7 3. geometric, r = , a6= 4. arithmetic, d = -4, a6 = -16 5. 6. 7. 8. 9.
21. 22. Find the sum of the following geometric series. 23. ; n = 15 24. 1000 + 500 + 250 + 125 + ... ; n = 20 25. 26. Answers 1. geometric, r = 4, a6= 3072 2. arithmetic, d = 2, a6 = 7 3. geometric, r = , a6= 4. arithmetic, d = -4, a6 = -16 5. 6. 7. 8. 9.