Answer
$a_{1}=3;a_{2}=-9;a_{3}=27;a_{4}=-81;a_{5}=243$
Work Step by Step
$a_{1}=3\left( -3\right) ^{1-1}=3;$
$a_{2}=3\times \left( -3\right) ^{2-1}=-9;$
$a_{3}=3\times \left( -3\right) ^{3-1}=27;$
$a_{4}=3\times \left( -3\right) ^{4-1}=-81;$
$a_{5}=3\times \left( -3\right) ^{5-1}=243$
