Mathematics for IGCSE & O level - Sequences (Section 3 - No. 44)
The first three terms of a sequence are 8, 15, 22. What is the formula for the nth term?
7n + 1
7n + 8
n + 7
n + 8
Erläuterung
The sequence adds 7 each time. The first term is 8. Using the formula 7n + 1, when n=1 the term is 8.