Answer
$5,15,45, 135, 405$
Work Step by Step
The general formula to find the nth term of a Geometric sequence is given as: $ a_{n+1}=a_nr $
We are given that $ a_1=5$
so, $ a_2=a_1r = (5)(3)=15 ;\\ a_3=a_2r = (15)(3)=45; \\ a_4=a_3r = (45)(3)=135 ; \\ a_5=a_4r = (135)(3)=405$
Hence, the first five terms are: $5,15,45, 135, 405$
