Answer:
1. A arithmetic sequence that starts at 1 and has a common difference of 3
2. A geometric sequence that starts at 1 and has a common ratio of 3
3. 15, 19, 23, 27, 31, ...
- (b) arithmetic sequence; common difference of 4
4. 3, 27/3, 27, 243/3, 243, ...
- (c) geometric sequence; common ratio of 3
5. -2, 16/4, -8, 16, -32, ...
- (a) geometric sequence; common ratio of -2
6. 8, 40, 200, 1000, 5000, ...
- (i) geometric sequence; common ratio of 5
7. 1432, 143.2, 14.32, 1.432, ...
- (f) geometric sequence; common ratio of 0.1
