Respuesta :

devishri1977

Answer:

Step-by-step explanation:

Common ratio (r) = 2nd term / 1st term = 15/3 = 5

Recursive formula:

[tex]a_{n}=a_{n-1}*r \\\\a_{n}=a_{n-1}*5\\=5a_{n-1}[/tex]

Explicit formula:

a = first term = 3

[tex]a_{n}=ar^{n-1}\\\\a_{n}=3*(5)^{n-1}\\[/tex]

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