Mathematics for IGCSE & O level - Sequences (Section 2 - No. 15)
Find the first four terms of the sequence defined by the formula \(U_n = 3n - 1\).
2, 5, 8, 11
3, 5, 7, 9
1, 2, 3, 4
4, 5, 6, 7
Explicació
Substitute n = 1, 2, 3, and 4 into the formula.