Mathematics for IGCSE & O level - Sequences (Section 1 - No. 30)
Which of the following is the correct formula to find the nth term of an arithmetic sequence?
an+b
a+(n-1)d
ar^(n-1)
n^2+bn+c
Explication
This formula describes how to get the nth term in an arithmetic sequence, where 'a' is the first term, 'd' is the common difference, and 'n' is the term number.