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Tamiku [17]
3 years ago
5

Determine 7th term in the geometric sequence whise first term is 5 and whose ratio is 2 .

Mathematics
2 answers:
adoni [48]3 years ago
6 0
\bf n^{th}\textit{ term of a geometric sequence}\\\\
a_n=a_1\cdot r^{n-1}\qquad 
\begin{cases}
n=n^{th}\ term\\
a_1=\textit{first term's value}\\
r=\textit{common ratio}\\
----------\\
n=7\\
a_1=5\\
r=2
\end{cases}\implies a_7=5\cdot 2^{7-1}
Igoryamba3 years ago
3 0
5, 10, 20, 40, 80, 160 and the Seventh term would be 320
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