Find the 9 th term of the arithmetic sequence if the common difference is 7 and the 8 th term is 51. We hit the seed value so we are done with the first phase. Identify the second terma 2displaystyle a_ 2 a2 which is given as.
Find the common ratio.
A recursive formula is a formula for a sequence that depends on one or more of the earlier terms in the sequence. Figure out the common difference Pick a term in the sequence and subtract the term that comes before it. The second term is as follows. A n a n-1 common difference a 1 first term Finding the Formula given a sequence without the first term 1.