Given rule an= 2(n 2 + 2n), find the first term in the sequence A. 4 B. 6 C. 8 D. 16

asked Oct 8, 2019 229k views

1 vote

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

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

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4 votes

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

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