Mathematics for IGCSE & O level - Sequences (Section 4 - No. 29)
In the sequence 3, 10, 17, 24, ... what is the formula for the nth term?
7n - 4
7n + 3
3n + 7
n + 7
Объяснение
The difference between the terms is 7 and the 1st term is 3. Using 7n+3 when n = 1 will give the correct term of 3.