Mathematics for IGCSE & O level - Sequences (Section 2 - No. 16)
What is the formula for the nth term of the sequence 7, 10, 13, 16,...?
3n - 4
4n - 3
3n + 4
4n + 3
Vysvětlení
The difference between terms is 3, so it's going to include 3n. 3(1) + 4 = 7.