Mathematics for IGCSE & O level - Sequences (Section 3 - No. 18)

Given the sequence: 4, 1, -2, -5, ... what is the nth term?

-3n + 7

3n-7

3n+7

-3n-7

The sequence decreases by 3 each term, and when n = 1, the term is 4. The formula is -3n+7.