Question

Given rule an= 2(n 2 + 2n), find the first term in the sequence

A. 4
B. 6
C. 8
D. 16

Answer 1

`a_n=2(n^2+2n)\\\\a_1-first\ term\to n=1\\\\a_n=2(1^2+2\cdot1)=2(1+2)=2(3)=6\\\\Answer:\ \boxed{B.\ 6}`