Respostas

2013-06-18T12:50:19-03:00

a_{n}=a_{1}.q^{n-1}

\begin{cases}a_{n}=?\\a_{1}=1\\q=9/3=3\\n=8\end{cases} \\a_{8}=1.3^{8-1}\\a_{8}=3^{7}\\a_{8}=2187

 

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