Respuesta :

I believe its the last one but don"t mark my words. 
[tex]a_{n}=ar^{n-1}[/tex]
[tex]a_{10}=\frac{1}{3}3^{10-1}[/tex]
[tex]a_{10}=\frac{1}{3}3^{9}[/tex]
[tex]a_{10}=\frac{19683}{3}[/tex]
[tex]a_{10}=6561[/tex]