3 years ago

What is the 8th term of the sequence 6,18,54,....?

1 answer:

7 0

$r = \frac{18}{6} \\ 
r = 3 \\ 
 \\ 
 a_{n} = a_{1} * r^{n-1} \\ 
 a_{8} = 6 * 3^{8 - 1} \\ 
a_{8} = 6 * 3^{7} \\
a_{8} = 6 * 2187 \\
a_{8} = 13122 

$

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- -------------

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