Mathematics for IGCSE & O level - Sequences (Section 1 - No. 24) | ExamPlay

Zalogować się

Mathematics for IGCSE & O level - Sequences (Section 1 - No. 24)

Consider the sequence with the general formula \(U_n = n^2 + 3n - 1\). Find \(U_4\).

15

20

27

31

Wyjaśnienie

Substitute n = 4: \(4^2 + 3*4 - 1 = 16 + 12 - 1 = 27\)

Uwagi (0)

Reklama