Mathematics for IGCSE & O level - Sequences (Section 2 - No. 3)

The nth term of a sequence is given by \(U_n = n^2 + 2n\). What is the value of \(U_3\)?

12

15

21

24

Тайлбар

Substitute n=3 into the formula: U_3 = (3)^2 + 2*3 = 15

Смхиман (0)

Сурталчилгаа

Javascript-д энэ хуудсыг зохих ёсоор ачаалахыг зөвшөөрнө үү