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An arithmetic sequence.
From any term after the first, subtract the preceding term.
To find the term number when the term value is 53 in a sequence, you need to know the pattern or formula of the sequence. If it is an arithmetic sequence with a common difference of d, you can use the formula for the nth term of an arithmetic sequence: ( a_n = a_1 + (n-1)d ), where ( a_n ) is the nth term, ( a_1 ) is the first term, and d is the common difference. By plugging in the values, you can solve for the term number.
The given sequence is an arithmetic sequence with a common difference of 7. To find the nth term of an arithmetic sequence, you can use the formula: nth term = first term + (n-1) * common difference. In this case, the first term is 12 and the common difference is 7. Therefore, the nth term of this sequence would be 12 + (n-1) * 7.
The 90th term of the arithmetic sequence is 461