c. O 16. What is the sum of the first 14 terms of the geometric sequence -9,9,-9,9,-9, ...? a.9 b.-9 d. 1
17. Which set of numbers is an example of finite geometric sequence? a.2, 6, 10, 14, 18,... b. 2, 6, 18,54 c. 4, 8, 12, 16, 20 d. 3, 6, 12, 24, ...
18. Which nth term of the arithmetic sequence 5, 9, 13, 17, 21, 25,... is 401? a. 100 b. 102 c.99 d.110​