Mathematics for IGCSE & O level - Sequences (Section 4 - No. 18)
Which sequence(s) is/are an arithmetic sequence?
1, 2, 3, 4, ...
2, 4, 8, 16, ...
5, 10, 15, 20, ...
1, 4, 9, 16, ...
Vysvětlení
Arithmetic sequences have a constant difference between consecutive terms.