A. Find the missing terms in each arithmetic sequence
1. 3, 12, 21.
2. 8, 3, -2,
3. 5, 12
26,
4. 2, 20, 29,
5. 4, 10, 16,
6. 17. 14,
7. 4.
19, 24,...
8.
8, 12, 16
9. -1.
31, 39
10. 13,
e-11-17
​