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There is only one type of arithmetic sequence.

The sequence may be defined by a "position-to-value" rule. This would be of the form:

U(n) = a + n*d

where a a constant which equals what the 0th term in the sequence would be,

d is also a constant - the common difference between each term in the sequence and the preceding term.

and n is a variable that is a counter for the position of the term in the sequence.


The same sequence can be defined iteratively by:

U(0) = a

U(n+1) = U(n) + d for n = 1, 2, 3, ...

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9y ago

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