An article sequence is a recursive sequence that has the same difference, the common difference, between any pair of consecutive terms. An arithmetic sequence can be defined as the following:
an=a+(n-1)d
d=common difference.
a=first term of the sequence.
an=nth term of the sequence.
A geometric sequence is defined as a sequence that has the same ratio, the common ratio, between any pair of consecutive terms. The geometric sequence can be represented as the following formula:
an=ar^(n-1)
an=nth term of the sequence.
a=first term of the sequence.
r=common ratio.
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