Find the 84th term of the arithmetic sequence 18, 31, 44, ……
The arithmetic sequence is starting with 18, and then you are adding 13, eightythree times.
In other words, the first term is 18 and the common difference is 13. To find the 84th term: 18 + 13(83) {start with 18 (the first term) and add 13 eightythree times} = 18 + 1079 {multiplied 13 by 83} = 1097 {added} The 84th term is 1097. Ask Algebra House
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