Answer
$2,8,18,32$
Work Step by Step
$f(n)=2n^{2}$
$f(1)=2(1)^{2}=2$
$f(2)=2(2)^{2}=8$
$f(3)=2(3)^{2}=18$
$f(4)=2(4)^{2}=32$
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