The first term of the sequence. For example suppose the common ratio is 9. A recursive formula is a formula for a sequence that depends on one or more of the earlier terms in the sequence.
A n.
Thus this is the main difference between recursive and explicit. A recursive formula allows us to find any term of an arithmetic sequence using a function of the preceding term. A n. A recursive formula is a formula that requires the computation of all previous terms in order to find the value of a n.