Find the 40th term in each arithmetic sequence.
1. 4, 8, 12, 16, ...
2. 13, 26, 39, 52, ...
3. 6, 12, 18, 24, ...
3 answers
40th term = 1st term + [39 * (2nd term - 1st term)]
13, 26, 39, 52
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