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Answer each item carefully with SOLUTION.
1. The 3rd term of an arithmetic sequence is 8 and the 16th term is 47. Find the common difference.
2. What is 30th term of the arithmetic sequence if the first term is 5 and the common difference is 4?
3. What is the first term of the sequence if as = 26 and a 12 = 47?
In the sequence 2, 6, 10, 14, ... which term has a value of 296?
4. Insert three arithmetic means between 2 and 22.
5. Find the sum of the first 30 terms of the arithmetic sequence 2,5, 8, 11, ...
6. If Sn = 1800, an= 185, n = 18, find ai.



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