As with any recursive formula the first term must be given. Find the sum of first 650 terms of the sequence of this arithmetic sequence that we have just defined. An an1 d.
Let me write that down.
An n 1 Recursive formula. A recursive formula allows us to find any term of an arithmetic sequence using a function of the preceding term. A1c a n-1 where c is the constant and r is the common ratio. In arithmetic sequences with common difference d the recursive formula is expressed as.