Answer
$1,2,3,5,8$
Work Step by Step
$a_{1}=1,\ \quad $
$a_{2}=2$
$.\qquad a_{n}=a_{n-1}+a_{n-2}$
$a_{3}=a_{2}+a_{1}=1+2=3$
$a_{4}=a_{3}+a_{2}=3+2=5$
$a_{5}=a_{4}+a_{3}=5+3=8$
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